semiautomatic vs pistol

semiautomatic and pistol both are nouns.

Word	Noun	Adjective	Verb	Adverb
semiautomatic	Yes	Yes	No	No
pistol	Yes	No	No	No

As nouns, pistol is a hypernym of semiautomatic; that is, pistol is a word with a broader meaning than semiautomatic:

semiautomatic: a pistol that is a semiautomatic firearm capable of loading and firing continuously
pistol: a firearm that is held and fired with one hand

Other hypernyms of semiautomatic include handgun, shooting iron, side arm, semiautomatic firearm.

semiautomatic (noun)	pistol (noun)
a pistol that is a semiautomatic firearm capable of loading and firing continuously	a firearm that is held and fired with one hand

semiautomatic (adjective)	pistol (adjective)
(of firearms) capable of automatic loading and firing continuously
partially automatic