ebonise vs stain

ebonise is not a noun while stain is a noun.

Word	Noun	Adjective	Verb	Adverb
ebonise	No	No	Yes	No
stain	Yes	No	Yes	No

As verbs, stain is a hypernym of ebonise; that is, stain is a word with a broader meaning than ebonise:

ebonise (noun)	stain (noun)
	an act that brings discredit to the person who does it
	a soiled or discolored appearance
	a symbol of disgrace or infamy
	anything regarded as making something unclean
	(microscopy) a dye or other coloring material that is used in microscopy to make structures visible

ebonise (verb)	stain (verb)
stain black to make it look like ebony	produce or leave stains
	color with a liquid dye or tint
	color for microscopic study
	make dirty or spotty, as by exposure to air; also used metaphorically