maintain vs carry on

maintain and carry on both are verbs.

Word	Noun	Adjective	Verb	Adverb
maintain	No	No	Yes	No
carry on	No	No	Yes	No

As verbs, carry on is a hyponym of maintain; that is, carry on is a word with a more specific, narrower meaning than maintain:

maintain (verb)	carry on (verb)
stick to correctly or closely	continue talking
state categorically	direct the course of; manage or control
state or assert	misbehave badly; act in a silly or improper way
support against an opponent	keep or maintain in unaltered condition; cause to remain or last
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