brown vs chromatic

brown is a noun but chromatic is not a noun.

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

brown (noun)	chromatic (noun)
an orange of low brightness and saturation

brown (adjective)	chromatic (adjective)
(of skin) deeply suntanned	being or having or characterized by hue
of a color similar to that of wood or earth	based on a scale consisting of 12 semitones
	able to refract light without spectral color separation

brown (verb)	chromatic (verb)
fry in a pan until it changes color
make brown in color