ceiling vs room

ceiling and room both are nouns.

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

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

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