cloud nine vs ecstasy

cloud nine and ecstasy both are nouns.

Word	Noun	Adjective	Verb	Adverb
cloud nine	Yes	No	No	No
ecstasy	Yes	No	No	No

As nouns, ecstasy is a hyponym of cloud nine; that is, ecstasy is a word with a more specific, narrower meaning than cloud nine:

Other hyponyms of cloud nine include rapture.

cloud nine (noun)	ecstasy (noun)
a state of extreme happiness	street names for methylenedioxymethamphetamine
	a state of being carried away by overwhelming emotion
	a state of elated bliss