red vs crimson

red and crimson both are nouns.

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

As adjectives, red and crimson are synonyms defined as:

red and crimson: (especially of the face) reddened or suffused with or as if with blood from emotion or exertion

Other synonyms of red include flushed, red-faced, reddened.

As adjectives, red and crimson are synonyms defined as:

red and crimson: of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies

Other synonyms of red include blood-red, carmine, cerise, cherry-red, cherry, reddish, ruby-red, ruby, ruddy, scarlet.

As adjectives, red and crimson are synonyms defined as:

Other synonyms of red include violent.

As nouns, crimson is a hyponym of red; that is, crimson is a word with a more specific, narrower meaning than red:

red (noun)	crimson (noun)
red color or pigment; the chromatic color resembling the hue of blood	a deep and vivid red color
emotionally charged terms used to refer to extreme radicals or revolutionaries
the amount by which the cost of a business exceeds its revenue

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

red (verb)	crimson (verb)
	turn red, as if in embarrassment or shame