color vision vs trichromacy

color vision and trichromacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
color vision	Yes	No	No	No
trichromacy	Yes	No	No	No

As nouns, color vision and trichromacy are synonyms defined as:

Other synonyms of color vision include chromatic vision.

color vision (noun)	trichromacy (noun)
the normal ability to see colors	the normal ability to see colors