left over vs unexpended

left over and unexpended both are adjectives.

Word	Noun	Adjective	Verb	Adverb
left over	No	Yes	No	No
unexpended	No	Yes	No	No

As adjectives, left over and unexpended are synonyms defined as:

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

left over (adjective)	unexpended (adjective)
not used up	not used up
	(of financial resources) not spent