WordNet sense 1 (misfortune resulting in lost effort or money):

gutter, sewer, sewer

WordNet sense 2 (a plumbing fixture for defecation and urination):

can, commode, pot, potty, stool, throne, crapper

WordNet sense 3 (a room or building equipped with one or more toilets):

bathroom, john, lavatory, privy, lav

WordNet sense 4 (the act of dressing and preparing yourself):

toilette