viewpoint vs slant

viewpoint and slant both are nouns.

Word	Noun	Adjective	Verb	Adverb
viewpoint	Yes	No	No	No
slant	Yes	No	Yes	No

As nouns, slant is a hyponym of viewpoint; that is, slant is a word with a more specific, narrower meaning than viewpoint:

Other hyponyms of viewpoint include cityscape, landscape, angle, complexion.

viewpoint (noun)	slant (noun)
a mental position from which things are viewed	degree of deviation from a horizontal plane
a place from which something can be viewed	a biased way of looking at or presenting something

viewpoint (verb)	slant (verb)
	present with a bias
	to incline or bend from a vertical position
	heel over
	lie obliquely