original vs unconventional

original is a noun but unconventional is not a noun.

Word	Noun	Adjective	Verb	Adverb
original	Yes	Yes	No	No
unconventional	No	Yes	No	No

original (noun)	unconventional (noun)
an original creation (i.e., an audio recording) from which copies can be made
something that serves as a model or a basis for making copies

original (adjective)	unconventional (adjective)
being or productive of something fresh and unusual; or being as first made or thought of	not conforming to accepted rules or standards
(of e.g. information) not secondhand or by way of something intermediary	not conventional or conformist
not derived or copied or translated from something else	not conforming to legality, moral law, or social convention
preceding all others in time or being as first made or performed