watercress vs chromatic

watercress is a noun but chromatic is not a noun.

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

watercress (noun)	chromatic (noun)
cresses that grow in clear ponds and streams
any of several water-loving cresses

watercress (adjective)	chromatic (adjective)
of a moderate yellow-green color that is greener and deeper than moss green and yellower and darker than pea green	being or having or characterized by hue
	based on a scale consisting of 12 semitones
	able to refract light without spectral color separation