maintenance vs support

maintenance and support both are nouns.

Word	Noun	Adjective	Verb	Adverb
maintenance	Yes	No	No	No
support	Yes	No	Yes	No

As nouns, support is a hypernym of maintenance; that is, support is a word with a broader meaning than maintenance:

maintenance: the act of sustaining life by food or providing a means of subsistence
support: the activity of providing for or maintaining by supplying with money or necessities

As nouns, support is a hypernym of maintenance; that is, support is a word with a broader meaning than maintenance:

Other hypernyms of maintenance include bread and butter, keep, livelihood, living, sustenance.

maintenance (noun)	support (noun)
activity involved in maintaining something in good working order	aiding the cause or policy or interests of
the act of sustaining life by food or providing a means of subsistence	the act of bearing the weight of or strengthening
the unauthorized interference in a legal action by a person having no interest in it (as by helping one party with money or otherwise to continue the action) so as to obstruct justice or promote unnecessary litigation or unsettle the peace of the community	documentary validation
means of maintenance of a family or group	a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission
court-ordered support paid by one spouse to another after they are separated	the activity of providing for or maintaining by supplying with money or necessities
	any device that bears the weight of another thing
	supporting structure that holds up or provides a foundation
	something providing immaterial assistance to a person or cause or interest
	a musical part (vocal or instrumental) that supports or provides background for other musical parts
	the financial means whereby one lives
	financial resources provided to make some project possible

maintenance (verb)	support (verb)
	establish or strengthen as with new evidence or facts
	put up with something or somebody unpleasant
	adopt as a belief
	argue or speak in defense of
	be a regular customer or client of
	be the physical support of; carry the weight of
	play a subordinate role to (another performer)
	support materially or financially
	give moral or psychological support, aid, or courage to
	be behind; approve of
	support with evidence or authority or make more certain or confirm