respond vs repay

respond and repay both are verbs.

Word	Noun	Adjective	Verb	Adverb
respond	No	No	Yes	No
repay	No	No	Yes	No

As verbs, repay is a hyponym of respond; that is, repay is a word with a more specific, narrower meaning than respond:

Other hyponyms of respond include call back, counter, field, sass, come back, rejoin, retort, return, riposte, bridle.

respond (verb)	repay (verb)
show a response or a reaction to something	answer back
respond favorably or as hoped	pay back
react verbally	make repayment for or return something
	act or give recompense in recognition of someone's behavior or actions