unprofitable vs marginal

unprofitable and marginal both are adjectives.

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

unprofitable (adjective)	marginal (adjective)
producing little or no profit or gain	of questionable or minimal quality
	just barely adequate or within a lower limit
	at or constituting a border or edge
	producing at a rate that barely covers production costs