council chamber vs boardroom

council chamber and boardroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
council chamber	Yes	No	No	No
boardroom	Yes	No	No	No

As nouns, council chamber and boardroom are synonyms defined as:

council chamber and boardroom: a room where a committee meets (such as the board of directors of a company)

council chamber (noun)	boardroom (noun)
a room where a committee meets (such as the board of directors of a company)	a room where a committee meets (such as the board of directors of a company)