stand up vs withstand

stand up and withstand both are verbs.

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

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

Other hypernyms of stand up include hold out, resist, stand firm.

stand up (verb)	withstand (verb)
defend against attack or criticism	stand up or offer resistance to somebody or something
refuse to back down; remain solid under criticism or attack	resist or confront with resistance
be standing; be upright
put into an upright position
rise to one's feet
rise up as in fear
resist or withstand wear, criticism, etc.