crimson vs discolor

crimson is a noun but discolor is not a noun.

Word	Noun	Adjective	Verb	Adverb
crimson	Yes	Yes	Yes	No
discolor	No	No	Yes	No

As verbs, discolor is a hypernym of crimson; that is, discolor is a word with a broader meaning than crimson:

Other hypernyms of crimson include color, colour, discolour.

crimson (noun)	discolor (noun)
a deep and vivid red color

crimson (adjective)	discolor (adjective)
characterized by violence or bloodshed
of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies
(especially of the face) reddened or suffused with or as if with blood from emotion or exertion

crimson (verb)	discolor (verb)
turn red, as if in embarrassment or shame	change color, often in an undesired manner
	lose color or turn colorless
	cause to lose or change color