weapon vs artillery

weapon and artillery both are nouns.

Word	Noun	Adjective	Verb	Adverb
weapon	Yes	No	No	No
artillery	Yes	No	No	No

As nouns, weapon and artillery are synonyms defined as:

weapon (noun)	artillery (noun)
any instrument or instrumentality used in fighting or hunting	large but transportable armament
a means of persuading or arguing	a means of persuading or arguing
	an army unit that uses big guns