act vs enter

act is a noun but enter is not a noun.

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

act (noun)	enter (noun)
something that people do or cause to happen
a subdivision of a play or opera or ballet
a legal document codifying the result of deliberations of a committee or society or legislative body
a short performance that is part of a longer program
a manifestation of insincerity

act (verb)	enter (verb)
behave in a certain manner; show a certain behavior; conduct or comport oneself	set out on (an enterprise or subject of study)
pretend to have certain qualities or state of mind	make a record of; set down in permanent form
discharge one's duties	become a participant; be involved in
play a role or part	put or introduce into something
perform on a stage or theater	come on stage
behave unnaturally or affectedly	to come or go into
perform an action, or work out or perform (an action)	take on duties or office
have an effect or outcome; often the one desired or expected	register formally as a participant or member
be suitable for theatrical performance	be or play a part of or in