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Synonyms for Bottom (same or very similar meaning)

WordNet sense 1 (the second half of an inning; while the home team is at bat):
bottom of the inning

WordNet sense 2 (low-lying alluvial land near a river):

WordNet sense 3 (a depression forming the ground under a body of water):

WordNet sense 4 (the lower side of anything):
underside, undersurface

WordNet sense 5 (the fleshy part of the human body that you sit on):
backside, behind, bum, buns, buttocks, can, derriere, fanny, hindquarters, posterior, rear, rump, seat, stern, tail, tush, arse, fundament, keister, nates, prat, tooshie, tush, tail end, hind end

WordNet sense 6 (a cargo ship):
freighter, merchantman, merchant ship

WordNet sense 7 (come to understand):
fathom, penetrate

WordNet sense 8 ((superlative of `bad') most wanting in quality or value or condition):

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