decelerate vs hold up

decelerate and hold up both are verbs.

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

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

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

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