Synonyms for Teensy-weensy (same or very similar meaning)
WordNet sense 1 ((used informally) very small):
bitty, itsy-bitsy, itty-bitty, teensy, teeny, teeny-weeny, wee, weensy, weeny, bittie, teentsyWordNet sense 2 (limited or below average in number or quantity or magnitude or extent):
little, smallFrom the ODE community, based on WordNetadd/edit