gunner vs artilleryman

gunner and artilleryman both are nouns.

Word	Noun	Adjective	Verb	Adverb
gunner	Yes	No	No	No
artilleryman	Yes	No	No	No

As nouns, gunner and artilleryman are synonyms defined as:

Other synonyms of gunner include cannoneer, machine gunner.

gunner (noun)	artilleryman (noun)
a serviceman in the artillery	a serviceman in the artillery