Pairing is the process of exchanging security information between two bluetooth devices so they can use an encrypted channel. Bonded means that the devices store a longer term key so that they need not reexchange security information. By that definition, a Bonded device is a paired device.
http://blog.bluetooth.com/bluetooth-pairing-part-1-pairing-feature-exchange
https://stackoverflow.com/questions/36396456/bluetooth-difference-between-pairing-and-paging-bonding