Grep from line separated file keywords

separate.sh

# https://stackoverflow.com/questions/1251999/how-can-i-replace-each-newline-n-with-a-space-using-sed
cat test | grep -E $(cat target | sed ':a;N;$!ba;s/\n/|/g')


# test
# 
# Hey yoyo
# today is a good day
# word1 is good
# word2 is not good
# you are good
# hello world
# yayayay



# target
# 
# word1
# word2