sustain vs confirm

sustain and confirm both are verbs.

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

As verbs, sustain and confirm are synonyms defined as:

sustain and confirm: establish or strengthen as with new evidence or facts

Other synonyms of sustain include affirm, corroborate, substantiate, support.

sustain (verb)	confirm (verb)
undergo (as of injuries and illnesses)	make more firm
establish or strengthen as with new evidence or facts	establish or strengthen as with new evidence or facts
admit as valid	strengthen or make more firm
supply with necessities and support	administer the rite of confirmation to
provide with nourishment	support a person for a position
be the physical support of; carry the weight of
lengthen or extend in duration or space