chock vs hold up

chock is a noun but hold up is not a noun.

Word	Noun	Adjective	Verb	Adverb
chock	Yes	No	Yes	Yes
hold up	No	No	Yes	No

As verbs, hold up is a hypernym of chock; that is, hold up is a word with a broader meaning than chock:

Other hypernyms of chock include hold, support, sustain.

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

chock (verb)	hold up (verb)
support on chocks	cause to be slowed down or delayed
secure with chocks	be the physical support of; carry the weight of
	hold up something as an example; hold up one's achievements for admiration
	rob at gunpoint or by means of some other threat
	continue to live and avoid dying
	resist or withstand wear, criticism, etc.
	resist or confront with resistance

chock (adverb)	hold up (adverb)
as completely as possible