isolation vs solitude

isolation and solitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
isolation	Yes	No	No	No
solitude	Yes	No	No	No

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

isolation (noun)	solitude (noun)
the act of isolating something; setting something apart from others	a solitary place
a country's withdrawal from international politics	a state of social isolation
a feeling of being disliked and alone	the state or situation of being alone
(psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it
a state of separation between persons or groups