isolation vs loneliness

isolation and loneliness both are nouns.

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

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

isolation (noun)	loneliness (noun)
the act of isolating something; setting something apart from others	a disposition toward being alone
a country's withdrawal from international politics	sadness resulting from being forsaken or abandoned
a feeling of being disliked and alone	the state of being alone in solitary isolation
(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