boardroom vs divan

boardroom and divan both are nouns.

Word	Noun	Adjective	Verb	Adverb
boardroom	Yes	No	No	No
divan	Yes	No	No	No

As nouns, divan is a hyponym of boardroom; that is, divan is a word with a more specific, narrower meaning than boardroom:

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

Other hyponyms of boardroom include diwan.

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