withstand vs hold up

withstand and hold up both are verbs.

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

As verbs, hold up is a hyponym of withstand; that is, hold up is a word with a more specific, narrower meaning than withstand:

Other hyponyms of withstand include stand out, stand up, outbrave, hold off, remain firm, stand, defy, hold, withstand.

As verbs, withstand and hold up are synonyms defined as:

Other synonyms of withstand include defy, hold.

withstand (verb)	hold up (verb)
stand up or offer resistance to somebody or something	cause to be slowed down or delayed
resist or confront with resistance	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