hardware vs arms

hardware and arms both are nouns.

Word	Noun	Adjective	Verb	Adverb
hardware	Yes	No	No	No
arms	Yes	No	No	No

As nouns, arms is a hypernym of hardware; that is, arms is a word with a broader meaning than hardware:

Other hypernyms of hardware include implements of war, munition, weaponry, weapons system.

hardware (noun)	arms (noun)
(computer science) the mechanical, magnetic, electronic, and electrical components making up a computer system	weapons considered collectively
major items of military weaponry (as tanks or missile)	the official symbols of a family, state, etc.
instrumentalities (tools or implements) made of metal