means vs expedient

means and expedient both are nouns.

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

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

means (noun)	expedient (noun)
to have the ability to produce a particular effect or achieve an end	a means to an end; not necessarily a principled or ethical one
an artifact (that is instrumental in accomplishing some end) for accomplishing some end
considerable capital (wealth or income)

means (adjective)	expedient (adjective)
	serving to promote your interest
	appropriate to a purpose; practical