empurple vs purple

empurple is not a noun while purple is a noun.

Word	Noun	Adjective	Verb	Adverb
empurple	No	No	Yes	No
purple	Yes	Yes	Yes	No

As verbs, empurple and purple are synonyms defined as:

Other synonyms of empurple include purpurate.

empurple (noun)	purple (noun)
	(Roman Catholic Church) official dress of a cardinal; so named after the Tyrial purple color of the robes
	a color between red and blue
	(in ancient Rome) position of imperial status

empurple (adjective)	purple (adjective)
	of a color intermediate between red and blue
	belonging to or befitting a supreme ruler
	excessively elaborate or showily expressed

empurple (verb)	purple (verb)
color purple	color purple
	become purple