autoloading vs semiautomatic

autoloading is not a noun while semiautomatic is a noun.

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

As adjectives, autoloading and semiautomatic are synonyms defined as:

autoloading and semiautomatic: (of firearms) capable of automatic loading and firing continuously

Other synonyms of autoloading include self-loading.

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

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