expedient vs crutch

expedient and crutch both are nouns.

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

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

Other hyponyms of expedient include make-do, makeshift, stopgap, improvisation, temporary expedient, last resort, pis aller.

expedient (noun)	crutch (noun)
a means to an end; not necessarily a principled or ethical one	anything that serves as an expedient
	a wooden or metal staff that fits under the armpit and reaches to the ground; used by disabled person while walking

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