slow up vs detain

slow up and detain both are verbs.

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

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

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

slow up (verb)	detain (verb)
lose velocity; move more slowly	cause to be slowed down or delayed
cause to proceed more slowly	stop or halt
become slow or slower	deprive of freedom; take into confinement