rich vs colourful

rich is a noun but colourful is not a noun.

Word	Noun	Adjective	Verb	Adverb
rich	Yes	Yes	No	No
colourful	No	Yes	No	No

rich (noun)	colourful (noun)
people who have possessions and wealth (considered as a group)

rich (adjective)	colourful (adjective)
possessing material wealth	having much or varied color
having an abundant supply of desirable qualities or substances (especially natural resources)	striking in variety and interest
suggestive of or characterized by great expense	having color or a certain color; sometimes used in combination
high in mineral content; having a high proportion of fuel to air
causing indignation due to hypocrisy
affording an abundant supply
strong; intense
marked by great fruitfulness
pleasantly full and mellow
marked by richness and fullness of flavor
containing plenty of fat, or eggs, or sugar
of great worth or quality
very productive