grunge vs stain

grunge and stain both are nouns.

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

As nouns, grunge and stain are synonyms defined as:

Other synonyms of grunge include dirt, filth, grease, grime, soil.

grunge (noun)	stain (noun)
anything regarded as making something unclean	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

grunge (verb)	stain (verb)
	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