WordNet sense 1 (time during which some action is awaited):

hold, postponement, wait, time lag

WordNet sense 2 (the act of delaying; inactivity resulting in something being put off until a later time):

holdup

WordNet sense 3 (stop or halt):

detain, stay

WordNet sense 4 (cause to be slowed down or delayed):

hold up

WordNet sense 5 (slow the growth or development of):

check