unusual vs grotesque

unusual is not a noun while grotesque is a noun.

Word	Noun	Adjective	Verb	Adverb
unusual	No	Yes	No	No
grotesque	Yes	Yes	No	No

unusual (noun)	grotesque (noun)
	art characterized by an incongruous mixture of parts of humans and animals interwoven with plants

unusual (adjective)	grotesque (adjective)
not usual or common or ordinary	ludicrously odd
being definitely out of the ordinary and unexpected; slightly odd or even a bit weird	distorted and unnatural in shape or size; abnormal and hideous
not commonly encountered