implements of war vs weapons system

implements of war and weapons system both are nouns.

Word	Noun	Adjective	Verb	Adverb
implements of war	Yes	No	No	No
weapons system	Yes	No	No	No

As nouns, implements of war and weapons system are synonyms defined as:

Other synonyms of implements of war include arms, munition, weaponry.

implements of war (noun)	weapons system (noun)
weapons considered collectively	weapons considered collectively