monochromasy vs monochromacy

monochromasy and monochromacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
monochromasy	Yes	No	No	No
monochromacy	Yes	No	No	No

As nouns, monochromasy and monochromacy are synonyms defined as:

monochromasy and monochromacy: complete color blindness; colors can be differentiated only on the basis of brightness

Other synonyms of monochromasy include monochromatic vision, monochromatism, monochromia.

monochromasy (noun)	monochromacy (noun)
complete color blindness; colors can be differentiated only on the basis of brightness	complete color blindness; colors can be differentiated only on the basis of brightness