assert vs maintain

assert and maintain both are verbs.

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

As verbs, assert and maintain are synonyms defined as:

Other synonyms of assert include asseverate.

assert (verb)	maintain (verb)
postulate positively and assertively	stick to correctly or closely
to declare or affirm solemnly and formally as true	state categorically
state categorically	state or assert
insist on having one's opinions and rights recognized	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