aver vs swan

aver is not a noun while swan is a noun.

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

As verbs, aver and swan are synonyms defined as:

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

aver (noun)	swan (noun)
	stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult

aver (verb)	swan (verb)
to declare or affirm solemnly and formally as true	to declare or affirm solemnly and formally as true
report or maintain	move about aimlessly or without any destination, often in search of food or employment
	sweep majestically