asseverate vs maintain

asseverate and maintain both are verbs.

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

As verbs, asseverate and maintain are synonyms defined as:

Other synonyms of asseverate include assert.

asseverate (verb)	maintain (verb)
state categorically	stick to correctly or closely
	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