stance vs standpoint

stance and standpoint both are nouns.

Word	Noun	Adjective	Verb	Adverb
stance	Yes	No	No	No
standpoint	Yes	No	No	No

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

Other hyponyms of stance include hard line, point of view, stand, viewpoint.

stance (noun)	standpoint (noun)
standing posture	a mental position from which things are viewed
a rationalized mental attitude