cannoneer vs artilleryman

cannoneer and artilleryman both are nouns.

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

As nouns, cannoneer and artilleryman are synonyms defined as:

Other synonyms of cannoneer include gunner, machine gunner.

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