manifestation vs act

manifestation and act both are nouns.

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

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

Other hyponyms of manifestation include lamentation, mourning, blowup, ebullition, effusion, gush, outburst.

manifestation (noun)	act (noun)
a public display of group feelings (usually of a political nature)	something that people do or cause to happen
a manifest indication of the existence or presence or nature of some person or thing	a subdivision of a play or opera or ballet
expression without words	a legal document codifying the result of deliberations of a committee or society or legislative body
a clear appearance	a short performance that is part of a longer program
an appearance in bodily form (as of a disembodied spirit)	a manifestation of insincerity

manifestation (verb)	act (verb)
	behave in a certain manner; show a certain behavior; conduct or comport oneself
	pretend to have certain qualities or state of mind
	discharge one's duties
	play a role or part
	perform on a stage or theater
	behave unnaturally or affectedly
	perform an action, or work out or perform (an action)
	have an effect or outcome; often the one desired or expected
	be suitable for theatrical performance