Word Study
bathtub
CIDE DICTIONARY
bathtub, n.
A relatively large tub used to take a bath, usually a permanent fixture in a bathroom; it is an open container that is filled with water, in which a person immerses himself for the purpose of washing the body. [WordNet 1.5]
THESAURUS
bathtub
aquamanile, automatic dishwasher, basin, bath, bidet, dishpan, dishwasher, ewer, finger bowl, kitchen sink, lavabo, lavatory, piscina, shower, shower bath, shower curtain, shower head, shower room, shower stall, showers, sink, tub, wash barrel, wash boiler, washbasin, washbowl, washdish, washer, washing machine, washing pot, washpot, washstand, washtubFor further exploring for "bathtub" in Webster Dictionary Online