red man vs slang

red man and slang both are nouns.

Word	Noun	Adjective	Verb	Adverb
red man	Yes	No	No	No
slang	Yes	No	Yes	No

red man (noun)	slang (noun)
(slang) offensive term for Native Americans	a characteristic language of a particular group (as among thieves)
	informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar