privy council vs diwan

privy council and diwan both are nouns.

Word	Noun	Adjective	Verb	Adverb
privy council	Yes	No	No	No
diwan	Yes	No	No	No

As nouns, diwan is a hyponym of privy council; that is, diwan is a word with a more specific, narrower meaning than privy council:

privy council: an advisory council to a ruler (especially to the British Crown)
diwan: a Muslim council of state

Other hyponyms of privy council include divan.

privy council (noun)	diwan (noun)
an advisory council to a ruler (especially to the British Crown)	a Muslim council chamber or law court
	a collection of Persian or Arabic poems (usually by one author)
	a Muslim council of state