shard

chip, flake, fragment, shiver, sliver, smithereens, splinter

ace, bit, crumb, dab, dram, driblet, glimmer, hint, lick, little, mite, nip, ounce, particle, peanuts, ray, scintilla, scruple, shade, shadow, shred, skosh, smack, smell, smidgen (also smidgeon), snap, soupçon, spark, spatter, speck, splash, spot, sprinkling, strain, streak, suspicion, tad, touch, trace

hoot, iota, jot, minim, minimum, modicum, semblance, syllable, tittle, vestige, whit

atom, dot, fleck, flyspeck, grain, granule, molecule, morsel, mote, nubbin, patch, scrap

dash, drop, pinch

part, portion, section

bite, nibble, taste

handful, scattering, smatter, smattering

dose, shot

shred, tatter

clipping, paring, shaving