hold up vs stand firm

hold up and stand firm both are verbs.

Word	Noun	Adjective	Verb	Adverb
hold up	No	No	Yes	No
stand firm	No	No	Yes	No

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

Other hypernyms of hold up include hold out, resist, withstand.

hold up (verb)	stand firm (verb)
cause to be slowed down or delayed	refuse to abandon one's opinion or belief
be the physical support of; carry the weight of	stand up or offer resistance to somebody or something
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