elation vs mental state

elation and mental state both are nouns.

Word	Noun	Adjective	Verb	Adverb
elation	Yes	No	No	No
mental state	Yes	No	No	No

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

elation: an exhilarating psychological state of pride and optimism; an absence of depression
mental state: (psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic

Other hypernyms of elation include mental condition, psychological condition, psychological state.

elation (noun)	mental state (noun)
a feeling of joy and pride	(psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic
an exhilarating psychological state of pride and optimism; an absence of depression