Magento generated events; a number of models use automatically generated events through prefixes. This is a (non-exhaustive) list of a number of those events, combined with _save_before, _save_after, _save_commit_after, _delete_before, _delete_after, _delete_commit_after, _load_before & _load_after.

Magento generated events

tag_save_after
admin_roles_save_after
admin_user_save_after
review_save_after
catalogsearch_query_save_after
sales_order_save_after
sales_quote_address_save_after
sales_quote_payment_save_after
sales_quote_item_save_after
sales_quote_save_after
sales_order_status_history_save_after
sales_invoice_item_save_after
sales_order_invoice_save_after
sales_order_payment_transaction_save_after
sales_order_address_save_after
sales_order_shipment_track_save_after
sales_shipment_item_save_after
sales_order_payment_save_after
sales_order_shipment_save_after
sales_order_item_save_after
sales_order_creditmemo_save_after
sales_creditmemo_item_save_after
catalog_product_import_save_after
catalog_entity_attribute_save_after
catalog_compare_item_save_after
catalogrule_rule_save_after
store_group_save_after
website_save_after
core_config_data_save_after
core_file_storage_database_save_after
core_file_storage_file_save_after
core_file_storage_directory_database_save_after
core_file_storage_save_after
store_save_after
core_abstract_save_after
eav_form_element_save_after
eav_form_fieldset_save_after
eav_form_type_save_after
eav_entity_attribute_set_save_after
customer_address_save_after
customer_group_save_after
customer_entity_attribute_save_after
customer_save_after
cms_page_save_after
api_user_save_after
newsletter_subscriber_save_after
system_config_price_scope_save_after
core_config_backend_design_exception_save_after
adminhtml_system_config_backend_cookie_save_after
paypal_payment_transaction_save_after
salesrule_rule_save_after
wishlist_save_after
wishlist_item_save_after
widget_widget_instance_save_after
cataloginventory_stock_item_save_after
tag_save_before
admin_roles_save_before
admin_user_save_before
review_save_before
catalogsearch_query_save_before
sales_order_save_before
sales_quote_address_save_before
sales_quote_payment_save_before
sales_quote_item_save_before
sales_quote_save_before
sales_order_status_history_save_before
sales_invoice_item_save_before
sales_order_invoice_save_before
sales_order_payment_transaction_save_before
sales_order_address_save_before
sales_order_shipment_track_save_before
sales_shipment_item_save_before
sales_order_payment_save_before
sales_order_shipment_save_before
sales_order_item_save_before
sales_order_creditmemo_save_before
sales_creditmemo_item_save_before
catalog_product_import_save_before
catalog_entity_attribute_save_before
catalog_compare_item_save_before
catalogrule_rule_save_before
store_group_save_before
website_save_before
core_config_data_save_before
core_file_storage_database_save_before
core_file_storage_file_save_before
core_file_storage_directory_database_save_before
core_file_storage_save_before
store_save_before
core_abstract_save_before
eav_form_element_save_before
eav_form_fieldset_save_before
eav_form_type_save_before
eav_entity_attribute_set_save_before
customer_address_save_before
customer_group_save_before
customer_entity_attribute_save_before
customer_save_before
cms_page_save_before
api_user_save_before
newsletter_subscriber_save_before
system_config_price_scope_save_before
core_config_backend_design_exception_save_before
adminhtml_system_config_backend_cookie_save_before
paypal_payment_transaction_save_before
salesrule_rule_save_before
wishlist_save_before
wishlist_item_save_before
widget_widget_instance_save_before
cataloginventory_stock_item_save_before
tag_save_commit_after
admin_roles_save_commit_after
admin_user_save_commit_after
review_save_commit_after
catalogsearch_query_save_commit_after
sales_order_save_commit_after
sales_quote_address_save_commit_after
sales_quote_payment_save_commit_after
sales_quote_item_save_commit_after
sales_quote_save_commit_after
sales_order_status_history_save_commit_after
sales_invoice_item_save_commit_after
sales_order_invoice_save_commit_after
sales_order_payment_transaction_save_commit_after
sales_order_address_save_commit_after
sales_order_shipment_track_save_commit_after
sales_shipment_item_save_commit_after
sales_order_payment_save_commit_after
sales_order_shipment_save_commit_after
sales_order_item_save_commit_after
sales_order_creditmemo_save_commit_after
sales_creditmemo_item_save_commit_after
catalog_product_import_save_commit_after
catalog_entity_attribute_save_commit_after
catalog_compare_item_save_commit_after
catalogrule_rule_save_commit_after
store_group_save_commit_after
website_save_commit_after
core_config_data_save_commit_after
core_file_storage_database_save_commit_after
core_file_storage_file_save_commit_after
core_file_storage_directory_database_save_commit_after
core_file_storage_save_commit_after
store_save_commit_after
core_abstract_save_commit_after
eav_form_element_save_commit_after
eav_form_fieldset_save_commit_after
eav_form_type_save_commit_after
eav_entity_attribute_set_save_commit_after
customer_address_save_commit_after
customer_group_save_commit_after
customer_entity_attribute_save_commit_after
customer_save_commit_after
cms_page_save_commit_after
api_user_save_commit_after
newsletter_subscriber_save_commit_after
system_config_price_scope_save_commit_after
core_config_backend_design_exception_save_commit_after
adminhtml_system_config_backend_cookie_save_commit_after
paypal_payment_transaction_save_commit_after
salesrule_rule_save_commit_after
wishlist_save_commit_after
wishlist_item_save_commit_after
widget_widget_instance_save_commit_after
cataloginventory_stock_item_save_commit_after
tag_delete_before
admin_roles_delete_before
admin_user_delete_before
review_delete_before
catalogsearch_query_delete_before
sales_order_delete_before
sales_quote_address_delete_before
sales_quote_payment_delete_before
sales_quote_item_delete_before
sales_quote_delete_before
sales_order_status_history_delete_before
sales_invoice_item_delete_before
sales_order_invoice_delete_before
sales_order_payment_transaction_delete_before
sales_order_address_delete_before
sales_order_shipment_track_delete_before
sales_shipment_item_delete_before
sales_order_payment_delete_before
sales_order_shipment_delete_before
sales_order_item_delete_before
sales_order_creditmemo_delete_before
sales_creditmemo_item_delete_before
catalog_product_import_delete_before
catalog_entity_attribute_delete_before
catalog_compare_item_delete_before
catalogrule_rule_delete_before
store_group_delete_before
website_delete_before
core_config_data_delete_before
core_file_storage_database_delete_before
core_file_storage_file_delete_before
core_file_storage_directory_database_delete_before
core_file_storage_delete_before
store_delete_before
core_abstract_delete_before
eav_form_element_delete_before
eav_form_fieldset_delete_before
eav_form_type_delete_before
eav_entity_attribute_set_delete_before
customer_address_delete_before
customer_group_delete_before
customer_entity_attribute_delete_before
customer_delete_before
cms_page_delete_before
api_user_delete_before
newsletter_subscriber_delete_before
system_config_price_scope_delete_before
core_config_backend_design_exception_delete_before
adminhtml_system_config_backend_cookie_delete_before
paypal_payment_transaction_delete_before
salesrule_rule_delete_before
wishlist_delete_before
wishlist_item_delete_before
widget_widget_instance_delete_before
cataloginventory_stock_item_delete_before
tag_delete_after
admin_roles_delete_after
admin_user_delete_after
review_delete_after
catalogsearch_query_delete_after
sales_order_delete_after
sales_quote_address_delete_after
sales_quote_payment_delete_after
sales_quote_item_delete_after
sales_quote_delete_after
sales_order_status_history_delete_after
sales_invoice_item_delete_after
sales_order_invoice_delete_after
sales_order_payment_transaction_delete_after
sales_order_address_delete_after
sales_order_shipment_track_delete_after
sales_shipment_item_delete_after
sales_order_payment_delete_after
sales_order_shipment_delete_after
sales_order_item_delete_after
sales_order_creditmemo_delete_after
sales_creditmemo_item_delete_after
catalog_product_import_delete_after
catalog_entity_attribute_delete_after
catalog_compare_item_delete_after
catalogrule_rule_delete_after
store_group_delete_after
website_delete_after
core_config_data_delete_after
core_file_storage_database_delete_after
core_file_storage_file_delete_after
core_file_storage_directory_database_delete_after
core_file_storage_delete_after
store_delete_after
core_abstract_delete_after
eav_form_element_delete_after
eav_form_fieldset_delete_after
eav_form_type_delete_after
eav_entity_attribute_set_delete_after
customer_address_delete_after
customer_group_delete_after
customer_entity_attribute_delete_after
customer_delete_after
cms_page_delete_after
api_user_delete_after
newsletter_subscriber_delete_after
system_config_price_scope_delete_after
core_config_backend_design_exception_delete_after
adminhtml_system_config_backend_cookie_delete_after
paypal_payment_transaction_delete_after
salesrule_rule_delete_after
wishlist_delete_after
wishlist_item_delete_after
widget_widget_instance_delete_after
cataloginventory_stock_item_delete_after
tag_delete_commit_after
admin_roles_delete_commit_after
admin_user_delete_commit_after
review_delete_commit_after
catalogsearch_query_delete_commit_after
sales_order_delete_commit_after
sales_quote_address_delete_commit_after
sales_quote_payment_delete_commit_after
sales_quote_item_delete_commit_after
sales_quote_delete_commit_after
sales_order_status_history_delete_commit_after
sales_invoice_item_delete_commit_after
sales_order_invoice_delete_commit_after
sales_order_payment_transaction_delete_commit_after
sales_order_address_delete_commit_after
sales_order_shipment_track_delete_commit_after
sales_shipment_item_delete_commit_after
sales_order_payment_delete_commit_after
sales_order_shipment_delete_commit_after
sales_order_item_delete_commit_after
sales_order_creditmemo_delete_commit_after
sales_creditmemo_item_delete_commit_after
catalog_product_import_delete_commit_after
catalog_entity_attribute_delete_commit_after
catalog_compare_item_delete_commit_after
catalogrule_rule_delete_commit_after
store_group_delete_commit_after
website_delete_commit_after
core_config_data_delete_commit_after
core_file_storage_database_delete_commit_after
core_file_storage_file_delete_commit_after
core_file_storage_directory_database_delete_commit_after
core_file_storage_delete_commit_after
store_delete_commit_after
core_abstract_delete_commit_after
eav_form_element_delete_commit_after
eav_form_fieldset_delete_commit_after
eav_form_type_delete_commit_after
eav_entity_attribute_set_delete_commit_after
customer_address_delete_commit_after
customer_group_delete_commit_after
customer_entity_attribute_delete_commit_after
customer_delete_commit_after
cms_page_delete_commit_after
api_user_delete_commit_after
newsletter_subscriber_delete_commit_after
system_config_price_scope_delete_commit_after
core_config_backend_design_exception_delete_commit_after
adminhtml_system_config_backend_cookie_delete_commit_after
paypal_payment_transaction_delete_commit_after
salesrule_rule_delete_commit_after
wishlist_delete_commit_after
wishlist_item_delete_commit_after
widget_widget_instance_delete_commit_after
cataloginventory_stock_item_delete_commit_after
tag_load_before
admin_roles_load_before
admin_user_load_before
review_load_before
catalogsearch_query_load_before
sales_order_load_before
sales_quote_address_load_before
sales_quote_payment_load_before
sales_quote_item_load_before
sales_quote_load_before
sales_order_status_history_load_before
sales_invoice_item_load_before
sales_order_invoice_load_before
sales_order_payment_transaction_load_before
sales_order_address_load_before
sales_order_shipment_track_load_before
sales_shipment_item_load_before
sales_order_payment_load_before
sales_order_shipment_load_before
sales_order_item_load_before
sales_order_creditmemo_load_before
sales_creditmemo_item_load_before
catalog_product_import_load_before
catalog_entity_attribute_load_before
catalog_compare_item_load_before
catalogrule_rule_load_before
store_group_load_before
website_load_before
core_config_data_load_before
core_file_storage_database_load_before
core_file_storage_file_load_before
core_file_storage_directory_database_load_before
core_file_storage_load_before
store_load_before
core_abstract_load_before
eav_form_element_load_before
eav_form_fieldset_load_before
eav_form_type_load_before
eav_entity_attribute_set_load_before
customer_address_load_before
customer_group_load_before
customer_entity_attribute_load_before
customer_load_before
cms_page_load_before
api_user_load_before
newsletter_subscriber_load_before
system_config_price_scope_load_before
core_config_backend_design_exception_load_before
adminhtml_system_config_backend_cookie_load_before
paypal_payment_transaction_load_before
salesrule_rule_load_before
wishlist_load_before
wishlist_item_load_before
widget_widget_instance_load_before
cataloginventory_stock_item_load_before
tag_load_after
admin_roles_load_after
admin_user_load_after
review_load_after
catalogsearch_query_load_after
sales_order_load_after
sales_quote_address_load_after
sales_quote_payment_load_after
sales_quote_item_load_after
sales_quote_load_after
sales_order_status_history_load_after
sales_invoice_item_load_after
sales_order_invoice_load_after
sales_order_payment_transaction_load_after
sales_order_address_load_after
sales_order_shipment_track_load_after
sales_shipment_item_load_after
sales_order_payment_load_after
sales_order_shipment_load_after
sales_order_item_load_after
sales_order_creditmemo_load_after
sales_creditmemo_item_load_after
catalog_product_import_load_after
catalog_entity_attribute_load_after
catalog_compare_item_load_after
catalogrule_rule_load_after
store_group_load_after
website_load_after
core_config_data_load_after
core_file_storage_database_load_after
core_file_storage_file_load_after
core_file_storage_directory_database_load_after
core_file_storage_load_after
store_load_after
core_abstract_load_after
eav_form_element_load_after
eav_form_fieldset_load_after
eav_form_type_load_after
eav_entity_attribute_set_load_after
customer_address_load_after
customer_group_load_after
customer_entity_attribute_load_after
customer_load_after
cms_page_load_after
api_user_load_after
newsletter_subscriber_load_after
system_config_price_scope_load_after
core_config_backend_design_exception_load_after
adminhtml_system_config_backend_cookie_load_after
paypal_payment_transaction_load_after
salesrule_rule_load_after
wishlist_load_after
wishlist_item_load_after
widget_widget_instance_load_after
cataloginventory_stock_item_load_after

I'd instead sort it :D
But seems helpful