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Synonyms for Can (same or very similar meaning)

WordNet sense 1 (the quantity contained in a can):

WordNet sense 2 (a buoy with a round bottom and conical top):
can buoy

WordNet sense 3 (the fleshy part of the human body that you sit on):
backside, behind, bottom, bum, buns, buttocks, derriere, fanny, hindquarters, posterior, rear, rump, seat, stern, tail, tush, arse, fundament, keister, nates, prat, tooshie, tush, tail end, hind end

WordNet sense 4 (a plumbing fixture for defecation and urination):
commode, pot, potty, stool, throne, toilet, crapper

WordNet sense 5 (a room or building equipped with one or more toilets):
bathroom, john, lavatory, privy, lav

WordNet sense 6 (airtight sealed metal container for food or drink or paint etc.):
tin, tin can

WordNet sense 7 (terminate the employment of):
dismiss, fire, sack, terminate, force out, give the axe, give the sack, give notice, send away

WordNet sense 8 (preserve in a can or tin):
put up

From the ODE community, based on WordNetadd/edit