optimist vs chiliast

optimist and chiliast both are nouns.

Word	Noun	Adjective	Verb	Adverb
optimist	Yes	No	No	No
chiliast	Yes	No	No	No

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

optimist: a person disposed to take a favorable view of things
chiliast: a person who believes in the coming of the millennium (a time of great peace and prosperity)

Other hyponyms of optimist include millenarian, millenarist.

optimist (noun)	chiliast (noun)
a person disposed to take a favorable view of things	a person who believes in the coming of the millennium (a time of great peace and prosperity)