Synonyms for Midget (same or very similar meaning)
WordNet sense 1 (a person who is markedly small):
dwarf, nanus
WordNet sense 2 (very small):
bantam, diminutive, flyspeck, lilliputian, tiny
WordNet sense 3 (limited or below average in number or quantity or magnitude or extent):
little, small
From the ODE community, based on WordNet
add/edit