remaining vs unexpended

remaining and unexpended both are adjectives.

Word	Noun	Adjective	Verb	Adverb
remaining	No	Yes	No	No
unexpended	No	Yes	No	No

As adjectives, remaining and unexpended are synonyms defined as:

Other synonyms of remaining include left, left over, leftover, odd.

remaining (adjective)	unexpended (adjective)
not used up	not used up
	(of financial resources) not spent