Redskin vs Native American

Redskin and Native American both are nouns.

Word	Noun	Adjective	Verb	Adverb
Redskin	Yes	No	No	No
Native American	Yes	Yes	No	No

As nouns, Native American is a hypernym of Redskin; that is, Native American is a word with a broader meaning than Redskin:

Redskin: (slang) offensive term for Native Americans
Native American: any member of the peoples living in North or South America before the Europeans arrived

Other hypernyms of Redskin include Amerindian.

Redskin (noun)	Native American (noun)
(slang) offensive term for Native Americans	any member of the peoples living in North or South America before the Europeans arrived

Redskin (adjective)	Native American (adjective)
	of or pertaining to Native Americans or their culture or languages