smidgin, smidge, tittle, whit, smidgeon, smidgen, shred, scintilla, theta, upsilon, more...

naught, nil, zero, zip, zilch

trace, speck, bit, touch, jot, whit, more...

single, last, little, smallest, greek, beta, gamma, slightest, tiniest, mere, alpha

tiniest bit,   letter before kappa,   9th greek letter,   slightest bit,   least little bit,   ninth greek letter,   the tiniest bit,   tiny bit of concern,   ounce of strength,   tiny bit of work