crimson vs deep red

crimson and deep red both are nouns.

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

As nouns, crimson and deep red are synonyms defined as:

Other synonyms of crimson include ruby.

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

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