semiautomatic pistol vs semiautomatic

semiautomatic pistol and semiautomatic both are nouns.

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

As nouns, semiautomatic pistol and semiautomatic are synonyms defined as:

semiautomatic pistol and semiautomatic: a pistol that is a semiautomatic firearm capable of loading and firing continuously

semiautomatic pistol (noun)	semiautomatic (noun)
a pistol that is a semiautomatic firearm capable of loading and firing continuously	a pistol that is a semiautomatic firearm capable of loading and firing continuously

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