nutshells

aces, dabs, dashes, driblets, drops, fractions, haets [chiefly Scottish], halfpence (or halfpennies), ha'pennies, iotas, jots, kennings [chiefly Scottish], licks, minims, mites, modicums, ounces, pinches, shreds, smatters, smidgens (also smidgeons), spots, strains, streaks, suspicions, tastes, touches, traces, whispers, whits

atoms, bits, crumbs, dribbles, flecks, flyspecks, grains, granules, molecules, morsels, motes, nubbins, nuggets, particles, patches, scraps, scruples, snips, snippets, specks, tittles

bites, mouthfuls, nibbles, tidbits (also titbits)

fragments, parts, portions, sections

chips, flakes, shards, shivers, slivers, splinters

clippings, parings, shavings

smithereens