Synonyms of drop-off

1 Syllable
drop, slack
2 Syllables
downswing, freeze, arrest, strike, delay, tailspin, downtrend, falloff, slow-up, slowdown, cache, caching, pratfall, tailspins, descent, cached, downturn, slowdowns
3 Syllables
stagnation, downslide, slackening, decline, stoppage, prolapse
4 Syllables
retardation
5 Syllables
deceleration, inactivity