hold up vs slow up

hold up and slow up both are verbs.

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

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

Other hypernyms of hold up include decelerate, retard, slow, slow down.

hold up (verb)	slow up (verb)
cause to be slowed down or delayed	lose velocity; move more slowly
be the physical support of; carry the weight of	cause to proceed more slowly
hold up something as an example; hold up one's achievements for admiration	become slow or slower
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