Bofors gun vs antiaircraft gun

Bofors gun and antiaircraft gun both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bofors gun	Yes	No	No	No
antiaircraft gun	Yes	No	No	No

As nouns, antiaircraft gun is a hypernym of Bofors gun; that is, antiaircraft gun is a word with a broader meaning than Bofors gun:

Other hypernyms of Bofors gun include ack-ack, ack-ack gun, antiaircraft, flack, flak, pom-pom.

Bofors gun (noun)	antiaircraft gun (noun)
an automatic double-barreled antiaircraft gun	artillery designed to shoot upward at airplanes