lull

[1]	soothe , calm , quiet , hush , pacify , mollify , tranquillize
[2]	calm down
[3]	calm , calm down , quiet , tranquilize , tranquillize , tranquillise , quieten , still

[1]	letup , pause , respite , interlude , intermission , interval , break , hiatus , interruption , stop , halt , lapse , delay , (Literary) caesura , (Colloq) let-up
[2]	quiet , quiet , quiescence , hush , calm , calmness , stillness , silence , peace , peacefulness , tranquillity