slow up vs hold up

slow up and hold up both are verbs.

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

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

Other hyponyms of slow up include slow, slow down, slow up, delay, detain.

slow up (verb)	hold up (verb)
lose velocity; move more slowly	cause to be slowed down or delayed
cause to proceed more slowly	be the physical support of; carry the weight of
become slow or slower	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