Synonyms of expeditive

1 Syllable
fleet, quick, fast, pdq
2 Syllables
fasted, quickest, fastest, quicker, fleetest, asap, rapid, chop-chop, fleeter, faster
3 Syllables
rapider, double-time, screamin', barreling
4 Syllables
hypersonic, harefooted, nimble-footed