Synonyms for Drench (same or very similar meaning)
WordNet sense 1 (drench or submerge or be drenched or submerged):
swampWordNet sense 2 (permeate or impregnate):
imbrueWordNet sense 3 (cover with liquid; pour liquid onto):
douse, dowse, soak, sop, souseFrom the ODE community, based on WordNetadd/edit