Similar word to retardation:

adjournment, bind, check, cooling-off period, cunctation, dawdling, demurral, detainment, detention, discontinuation, downtime, filibuster, hangup, hindrance, hold-up, holding, holding pattern, holdup, impediment, interval, jam, lag, lingering, logjam, loitering, moratorium, obstruction, postponement, problem, procrastination, prorogation, putting off, remission, reprieve, retardment, setback, showstopper, stall, stay, stop, stoppage, surcease, suspension, tarrying, tie-up, wait


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