hold up vs decelerate

hold up and decelerate both are verbs.

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

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

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

hold up (verb)	decelerate (verb)
cause to be slowed down or delayed	lose velocity; move more slowly
be the physical support of; carry the weight of	reduce the speed 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