troglodyte vs cave man

troglodyte and cave man both are nouns.

Word	Noun	Adjective	Verb	Adverb
troglodyte	Yes	No	No	No
cave man	Yes	No	No	No

As nouns, troglodyte and cave man are synonyms defined as:

Other synonyms of troglodyte include cave dweller, caveman.

troglodyte (noun)	cave man (noun)
someone who lives in a cave	someone who lives in a cave
one who lives in solitude