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Synonyms for Bit (same or very similar meaning)

WordNet sense 1 (an indefinitely short time):
minute, moment, second, minute

WordNet sense 2 (a small quantity):

WordNet sense 3 (a small fragment of something broken off from the whole):
chip, flake, fleck, scrap

WordNet sense 4 (a small amount of solid food; a mouthful):
bite, morsel

WordNet sense 5 (an instance of some kind):

WordNet sense 6 (a small fragment):

WordNet sense 7 (a short theatrical performance that is part of a longer program):
act, number, routine, turn, number

From the ODE community, based on WordNetadd/edit