Synonyms for Swamp (same or very similar meaning)
WordNet sense 1 (low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog):
swamplandWordNet sense 2 (drench or submerge or be drenched or submerged):
drenchWordNet sense 3 (fill quickly beyond capacity; as with a liquid):
deluge, flood, inundateFrom the ODE community, based on WordNetadd/edit