automatic vs handgun

automatic and handgun both are nouns.

Word	Noun	Adjective	Verb	Adverb
automatic	Yes	Yes	No	No
handgun	Yes	No	No	No

As nouns, handgun is a hypernym of automatic; that is, handgun is a word with a broader meaning than automatic:

automatic: a pistol that will keep firing until the ammunition is gone or the trigger is released
handgun: a firearm that is held and fired with one hand

Other hypernyms of automatic include automatic firearm, automatic gun, automatic weapon, pistol, shooting iron, side arm.

automatic (noun)	handgun (noun)
self-loading rifle capable of automatic fire	a firearm that is held and fired with one hand
a pistol that will keep firing until the ammunition is gone or the trigger is released

automatic (adjective)	handgun (adjective)
operating with minimal human intervention; independent of external control
without volition or conscious control
resembling the unthinking functioning of a machine