unmusical vs musical

unmusical is not a noun while musical is a noun.

Word	Noun	Adjective	Verb	Adverb
unmusical	No	Yes	No	No
musical	Yes	Yes	No	No

unmusical (noun)	musical (noun)
	a play or film whose action and dialogue is interspersed with singing and dancing

unmusical (adjective)	musical (adjective)
not musical in nature	characteristic of or resembling or accompanied by music
lacking interest in or talent for music	talented in or devoted to music
lacking melody	containing or constituting or characterized by pleasing melody
	characterized by or capable of producing music