nouns
an area within a building enclosed by walls and floor and ceiling
"the rooms were very small but they had a nice view"
is a part of
a structure that has a roof and walls and stands more or less permanently in one place
"there was a three-story building on the corner"; "it was an imposing edifice"
is a type of (narrower)
a part of a structure having some specific characteristic or function
"the spacious cooking area provided plenty of room for servants"
space for movement
"room to pass"; "make way for"; "hardly enough elbow room to turn around"
opportunity for
"room for improvement"
is a type of (narrower)
a possibility due to a favorable combination of circumstances
"the holiday gave us the opportunity to visit Washington"; "now is your chance"
the people who are present in a room
"the whole room was cheering"
is a type of (narrower)
a group of persons together in one place