divan vs council chamber

divan and council chamber both are nouns.

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

As nouns, council chamber is a hypernym of divan; that is, council chamber is a word with a broader meaning than divan:

divan: a Muslim council chamber or law court
council chamber: a room where a committee meets (such as the board of directors of a company)

Other hypernyms of divan include boardroom, chamber.

divan (noun)	council chamber (noun)
a long backless sofa (usually with pillows against a wall)	a room where a committee meets (such as the board of directors of a company)
a Muslim council chamber or law court
a collection of Persian or Arabic poems (usually by one author)
a Muslim council of state