redden vs colour

redden is not a noun while colour is a noun.

Word	Noun	Adjective	Verb	Adverb
redden	No	No	Yes	No
colour	Yes	Yes	Yes	No

As verbs, colour is a hypernym of redden; that is, colour is a word with a broader meaning than redden:

Other hypernyms of redden include color, discolor, discolour.

As verbs, colour is a hypernym of redden; that is, colour is a word with a broader meaning than redden:

Other hypernyms of redden include color, discolor, discolour.

As verbs, colour is a hypernym of redden; that is, colour is a word with a broader meaning than redden:

Other hypernyms of redden include color, color in, colorise, colorize, colour in, colourise, colourize.

redden (noun)	colour (noun)
	a visual attribute of things that results from the light they emit or transmit or reflect
	the appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturation
	the timbre of a musical sound
	interest and variety and intensity
	an outward or token appearance or form that is deliberately misleading
	(physics) the characteristic of quarks that determines their role in the strong interaction
	any material used for its color

redden (adjective)	colour (adjective)
	having or capable of producing colors

redden (verb)	colour (verb)
turn red, as if in embarrassment or shame	change color, often in an undesired manner
turn red or redder	add color to
make red	affect as in thought or feeling
	give a deceptive explanation or excuse for
	decorate with colors
	modify or bias