library vs reading room

library and reading room both are nouns.

Word	Noun	Adjective	Verb	Adverb
library	Yes	No	No	No
reading room	Yes	No	No	No

library (noun)	reading room (noun)
a depository built to contain books and other materials for reading and study	a room set aside for reading
a room where books are kept
a building that houses a collection of books and other materials
a collection of literary documents or records kept for reference or borrowing
(computing) a collection of standard programs and subroutines that are stored and available for immediate use