slant vs viewpoint

slant and viewpoint both are nouns.

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

As nouns, viewpoint is a hypernym of slant; that is, viewpoint is a word with a broader meaning than slant:

Other hypernyms of slant include point of view, stand, standpoint.

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

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