redound vs impact

redound is not a noun while impact is a noun.

Word	Noun	Adjective	Verb	Adverb
redound	No	No	Yes	No
impact	Yes	No	Yes	No

As verbs, impact is a hypernym of redound; that is, impact is a word with a broader meaning than redound:

Other hypernyms of redound include affect, bear on, bear upon, touch, touch on.

redound (noun)	impact (noun)
	influencing strongly
	the violent interaction of individuals or groups entering into combat
	the striking of one body against another
	a forceful consequence; a strong effect

redound (verb)	impact (verb)
contribute	have an effect upon
have an effect for good or ill	press or wedge together; pack together
return or recoil