Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
bath [bɑːθ] n ва́нна
vt купа́ть (вы́купать perf)
to have a bath принима́ть (приня́ть*perf) ва́нну see also baths
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.