room vs ceiling

room and ceiling both are nouns.

Word	Noun	Adjective	Verb	Adverb
room	Yes	No	Yes	No
ceiling	Yes	No	No	No

room (noun)	ceiling (noun)
an area within a building enclosed by walls and floor and ceiling	the overhead upper surface of a covered space
the people who are present in a room	(meteorology) altitude of the lowest layer of clouds
space for movement	maximum altitude at which a plane can fly (under specified conditions)
opportunity for	an upper limit on what is allowed

room (verb)	ceiling (verb)
live and take one's meals at or in