colourful vs fluorescent

colourful is not a noun while fluorescent is a noun.

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

colourful (noun)	fluorescent (noun)
	a lighting fixture that uses a fluorescent lamp

colourful (adjective)	fluorescent (adjective)
having much or varied color	brilliantly colored and apparently giving off light
striking in variety and interest	emitting light during exposure to radiation from an external source
having color or a certain color; sometimes used in combination