confirm vs uphold

confirm and uphold both are verbs.

Word	Noun	Adjective	Verb	Adverb
confirm	No	No	Yes	No
uphold	No	No	Yes	No

As verbs, uphold is a hyponym of confirm; that is, uphold is a word with a more specific, narrower meaning than confirm:

Other hyponyms of confirm include maintain, verify, corroborate, validate, reconfirm.

confirm (verb)	uphold (verb)
make more firm	stand up for; stick up for; of causes, principles, or ideals
establish or strengthen as with new evidence or facts	support against an opponent
strengthen or make more firm	keep or maintain in unaltered condition; cause to remain or last
administer the rite of confirmation to
support a person for a position