repulse vs push back

repulse and push back both are nouns.

Word	Noun	Adjective	Verb	Adverb
repulse	Yes	No	Yes	No
push back	Yes	No	Yes	No

As verbs, repulse and push back are synonyms defined as:

Other synonyms of repulse include beat back, drive, force back, repel.

repulse (noun)	push back (noun)
an instance of driving away or warding off	the act of forcing the enemy to withdraw

repulse (verb)	push back (verb)
force or drive back	cause to move back by force or influence
cause to move back by force or influence
be repellent to; cause aversion in