unprofitable vs lean

unprofitable is not a noun while lean is a noun.

Word	Noun	Adjective	Verb	Adverb
unprofitable	No	Yes	No	No
lean	Yes	Yes	Yes	No

unprofitable (noun)	lean (noun)
	the property possessed by a line or surface that departs from the vertical

unprofitable (adjective)	lean (adjective)
producing little or no profit or gain	lacking in mineral content or combustible material
	lacking excess flesh
	not profitable or prosperous
	containing little excess

unprofitable (verb)	lean (verb)
	rely on for support
	cause to lean or incline
	to incline or bend from a vertical position
	cause to lean to the side
	have a tendency or disposition to do or be something; be inclined