aver vs maintain

aver and maintain both are verbs.

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

As verbs, maintain is a hypernym of aver; that is, maintain is a word with a broader meaning than aver:

Other hypernyms of aver include assert, asseverate.

aver (verb)	maintain (verb)
to declare or affirm solemnly and formally as true	stick to correctly or closely
report or maintain	state categorically
	state or assert
	support against an opponent
	maintain by writing regular records
	supply with necessities and support
	keep in safety and protect from harm, decay, loss, or destruction
	have and exercise
	maintain for use and service
	cause to continue in a certain state, position, or activity