nugget

nosh, snack

appetizer, canapé, hors d'oeuvre

bit, chew, crumb, dab, dribble, driblet, fleck, hint, mote, nubbin, particle, pinch, scrap, scruple, shred, smidgen (also smidgeon), snip, snippet, speck, spot, sprinkling, suspicion, tittle, touch, trace

bead, drop, globule

block, body, bulk

particle, piece, portion

bit, chip, crumb, granule, morsel, nubbin, patch, scrap

ace, dab, dash, driblet, drop, fraction, iota, jot, lick, minim, mite, modicum, nutshell, ounce, pinch, shred, smatter, smidgen (also smidgeon), spot, strain, streak, suspicion, taste, touch, trace, whisper, whit

bite, mouthful, nibble, tidbit (also titbit)

fragment, part, portion, section

chip, flake, shard, shiver, sliver, splinter

clipping, paring, shaving

smithereens