expedient vs expedience

expedient and expedience both are nouns.

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

expedient (noun)	expedience (noun)
a means to an end; not necessarily a principled or ethical one	the quality of being suited to the end in view
	taking advantage of opportunities without regard for the consequences for others

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