act vs support

act and support both are nouns.

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

As verbs, support is a hyponym of act; that is, support is a word with a more specific, narrower meaning than act:

Other hyponyms of act include make, make believe, pretend, act out, enact, reenact, act out, impersonate, portray, parody, emote.

act (noun)	support (noun)
something that people do or cause to happen	aiding the cause or policy or interests of
a subdivision of a play or opera or ballet	the act of bearing the weight of or strengthening
a legal document codifying the result of deliberations of a committee or society or legislative body	documentary validation
a short performance that is part of a longer program	a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission
a manifestation of insincerity	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

act (verb)	support (verb)
behave in a certain manner; show a certain behavior; conduct or comport oneself	establish or strengthen as with new evidence or facts
pretend to have certain qualities or state of mind	put up with something or somebody unpleasant
discharge one's duties	adopt as a belief
play a role or part	argue or speak in defense of
perform on a stage or theater	be a regular customer or client of
behave unnaturally or affectedly	be the physical support of; carry the weight of
perform an action, or work out or perform (an action)	play a subordinate role to (another performer)
have an effect or outcome; often the one desired or expected	support materially or financially
be suitable for theatrical performance	give moral or psychological support, aid, or courage to
	be behind; approve of
	support with evidence or authority or make more certain or confirm