WordNet sense 1 (flowing in drops; the formation and falling of drops of liquid):

dribble, trickle

WordNet sense 2 (the sound of a liquid falling drop by drop):

dripping

WordNet sense 3 ((architecture) a projection from a cornice or sill designed to protect the area below from rainwater (as over a window or doorway)):

drip mold, drip mould

WordNet sense 4 (let or cause to fall in drops):

drop