tomahawk vs weapon system

tomahawk and weapon system both are nouns.

Word	Noun	Adjective	Verb	Adverb
tomahawk	Yes	No	Yes	No
weapon system	Yes	No	No	No

As nouns, weapon system is a hypernym of tomahawk; that is, weapon system is a word with a broader meaning than tomahawk:

tomahawk: weapon consisting of a fighting ax; used by North American Indians
weapon system: any instrument or instrumentality used in fighting or hunting

Other hypernyms of tomahawk include arm, weapon.

tomahawk (noun)	weapon system (noun)
weapon consisting of a fighting ax; used by North American Indians	any instrument or instrumentality used in fighting or hunting

tomahawk (verb)	weapon system (verb)
cut with a tomahawk
kill with a tomahawk