Colt vs revolver

Colt and revolver both are nouns.

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

As nouns, revolver is a hypernym of Colt; that is, revolver is a word with a broader meaning than Colt:

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

Other hypernyms of Colt include six-gun, six-shooter.

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