coloured vs polychromatic

coloured is a noun but polychromatic is not a noun.

Word	Noun	Adjective	Verb	Adverb
coloured	Yes	Yes	No	No
polychromatic	No	Yes	No	No

coloured (noun)	polychromatic (noun)
a United States term for Blacks that is now considered offensive

coloured (adjective)	polychromatic (adjective)
having color or a certain color; sometimes used in combination	(of light or other electromagnetic radiation) composed of more than one wavelength
(used of color) artificially produced; not natural	having or exhibiting many colors
having skin rich in melanin pigments;
favoring one person or side over another