room access vs entrance

room access and entrance both are nouns.

Word	Noun	Adjective	Verb	Adverb
room access	Yes	No	No	No
entrance	Yes	No	Yes	No

As nouns, entrance is a hypernym of room access; that is, entrance is a word with a broader meaning than room access:

room access: the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
entrance: something that provides access (to get in or get out)

Other hypernyms of room access include entranceway, entree, entry, entryway.

room access (noun)	entrance (noun)
the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close	the act of entering
	something that provides access (to get in or get out)
	a movement into or inward

room access (verb)	entrance (verb)
	put into a trance
	attract; cause to be enamored