Open English Wordnet
Nouns
(n)letup, lulla pause during which things are calm or activities are diminished“there was never a letup in the noise” (n)lull, quieta period of calm weather“there was a lull in the storm” Verbs
(v)lullcalm by deception“Don't let yourself be lulled into a false state of security” (v)lull, calm downbecome quiet or less intensive“the fighting lulled for a moment”