inefficient vs wasteful

inefficient and wasteful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
inefficient	No	Yes	No	No
wasteful	No	Yes	No	No

inefficient (adjective)	wasteful (adjective)
not producing desired results; wasteful	tending to squander and waste
lacking the ability or skill to perform effectively; inadequate	laying waste
	inefficient in use of time and effort and materials