seventh heaven vs elation

seventh heaven and elation both are nouns.

Word	Noun	Adjective	Verb	Adverb
seventh heaven	Yes	No	No	No
elation	Yes	No	No	No

As nouns, elation is a hypernym of seventh heaven; that is, elation is a word with a broader meaning than seventh heaven:

seventh heaven: a state of extreme happiness
elation: an exhilarating psychological state of pride and optimism; an absence of depression

seventh heaven (noun)	elation (noun)
a state of extreme happiness	a feeling of joy and pride
	an exhilarating psychological state of pride and optimism; an absence of depression