automatic weapon vs autoloader

automatic weapon and autoloader both are nouns.

Word	Noun	Adjective	Verb	Adverb
automatic weapon	Yes	No	No	No
autoloader	Yes	No	No	No

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

automatic weapon: a firearm that reloads itself and keeps firing until the trigger is released
autoloader: a firearm that reloads itself

Other hypernyms of automatic weapon include self-loader.

automatic weapon (noun)	autoloader (noun)
a firearm that reloads itself and keeps firing until the trigger is released	a firearm that reloads itself