avow vs aver

avow and aver both are verbs.

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

As verbs, avow and aver are synonyms defined as:

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

avow (verb)	aver (verb)
to declare or affirm solemnly and formally as true	to declare or affirm solemnly and formally as true
admit openly and bluntly; make no bones about	report or maintain