zero
noun
1 the sum's wrong—you've left off a zero:
nought, nothing, cipher, nil, 0;
Computing null character;
archaic naught.
2 the allowable dolphin kill will be gradually reduced each year to zero:
nothing, nil, nothing at all, not a single thing, not anything, none;
Northern English nowt;
informal zilch, nix, not a dicky bird;
British, informal damn all, not a sausage, sweet Fanny Adams, sweet FA;
North American, informal zip, zippo, nada, diddly-squat, a goose egg, bupkis;
British, vulgar slang bugger all, fuck all, sod all;
archaic naught, nought.