sustain vs chock

sustain is not a noun while chock is a noun.

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

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

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

sustain (noun)	chock (noun)
	a block of wood used to prevent the sliding or rolling of a heavy object

sustain (verb)	chock (verb)
undergo (as of injuries and illnesses)	support on chocks
establish or strengthen as with new evidence or facts	secure with chocks
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

sustain (adverb)	chock (adverb)
	as completely as possible