act vs theatre

act and theatre both are nouns.

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

act (noun)	theatre (noun)
something that people do or cause to happen	a building where theatrical performances or motion-picture shows can be presented
a subdivision of a play or opera or ballet	the art of writing and producing plays
a legal document codifying the result of deliberations of a committee or society or legislative body	a region in which active military operations are in progress
a short performance that is part of a longer program
a manifestation of insincerity

act (verb)	theatre (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