aver vs swear

aver and swear both are verbs.

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

As verbs, aver and swear are synonyms defined as:

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

aver (verb)	swear (verb)
to declare or affirm solemnly and formally as true	have faith or confidence in
report or maintain	make a deposition; declare under oath
	utter obscenities or profanities
	promise solemnly; take an oath
	to declare or affirm solemnly and formally as true