exert vs maintain

exert and maintain both are verbs.

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

As verbs, exert and maintain are synonyms defined as:

Other synonyms of exert include wield.

exert (verb)	maintain (verb)
put to use	stick to correctly or closely
have and exercise	state categorically
make a great effort at a mental or physical task	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