revolver vs Colt

revolver and Colt both are nouns.

Word	Noun	Adjective	Verb	Adverb
revolver	Yes	No	No	No
Colt	Yes	No	No	No

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

revolver: a pistol with a revolving cylinder (usually having six chambers for bullets)
Colt: a kind of revolver

Other hyponyms of revolver include blank revolver.

revolver (noun)	Colt (noun)
a pistol with a revolving cylinder (usually having six chambers for bullets)	a kind of revolver
a door consisting of four orthogonal partitions that rotate about a central pivot; a door designed to equalize the air pressure in tall buildings