means vs arms

means and arms both are nouns.

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

As nouns, arms is a hyponym of means; that is, arms is a word with a more specific, narrower meaning than means:

means: an artifact (that is instrumental in accomplishing some end) for accomplishing some end
arms: weapons considered collectively

means (noun)	arms (noun)
to have the ability to produce a particular effect or achieve an end	weapons considered collectively
an artifact (that is instrumental in accomplishing some end) for accomplishing some end	the official symbols of a family, state, etc.
considerable capital (wealth or income)