lilac vs chromatic

lilac is a noun but chromatic is not a noun.

Word	Noun	Adjective	Verb	Adverb
lilac	Yes	Yes	No	No
chromatic	No	Yes	No	No

lilac (noun)	chromatic (noun)
any of various plants of the genus Syringa having large panicles of usually fragrant flowers

lilac (adjective)	chromatic (adjective)
of a pale purple color	being or having or characterized by hue
	based on a scale consisting of 12 semitones
	able to refract light without spectral color separation