sustain vs scaffold

sustain is not a noun while scaffold is a noun.

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

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

Other hyponyms of sustain include block, carry, chock, buoy, buoy up, pole, bracket, underpin, prop, prop up, shore, shore up, truss, brace.

sustain (noun)	scaffold (noun)
	a temporary arrangement erected around a building for convenience of workers
	a platform from which criminals are executed (hanged or beheaded)

sustain (verb)	scaffold (verb)
undergo (as of injuries and illnesses)	provide with a scaffold for support
establish or strengthen as with new evidence or facts
admit as valid
supply with necessities and support
provide with nourishment
be the physical support of; carry the weight of
lengthen or extend in duration or space