hackbut vs arquebus

hackbut and arquebus both are nouns.

Word	Noun	Adjective	Verb	Adverb
hackbut	Yes	No	No	No
arquebus	Yes	No	No	No

As nouns, hackbut and arquebus are synonyms defined as:

Other synonyms of hackbut include hagbut, harquebus.

hackbut (noun)	arquebus (noun)
an obsolete firearm with a long barrel	an obsolete firearm with a long barrel