averment vs asseveration

averment and asseveration both are nouns.

Word	Noun	Adjective	Verb	Adverb
averment	Yes	No	No	No
asseveration	Yes	No	No	No

As nouns, averment and asseveration are synonyms defined as:

averment and asseveration: a declaration that is made emphatically (as if no supporting evidence were necessary)

Other synonyms of averment include assertion.

averment (noun)	asseveration (noun)
a declaration that is made emphatically (as if no supporting evidence were necessary)	a declaration that is made emphatically (as if no supporting evidence were necessary)