sustain vs validate

sustain and validate both are verbs.

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

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

Other hyponyms of sustain include back, back up, vouch, verify, demonstrate, establish, prove, shew, show, document.

sustain (verb)	validate (verb)
undergo (as of injuries and illnesses)	make valid or confirm the validity of
establish or strengthen as with new evidence or facts	prove valid; show or confirm the validity of something
admit as valid	give evidence for
supply with necessities and support	declare or make legally valid
provide with nourishment
be the physical support of; carry the weight of
lengthen or extend in duration or space