affirm vs aver

affirm and aver both are verbs.

Word	Noun	Adjective	Verb	Adverb
affirm	No	No	Yes	No
aver	No	No	Yes	No

As verbs, affirm and aver are synonyms defined as:

Other synonyms of affirm include assert, avow, swan, swear, verify.

affirm (verb)	aver (verb)
establish or strengthen as with new evidence or facts	to declare or affirm solemnly and formally as true
to declare or affirm solemnly and formally as true	report or maintain
say yes to