Two Syllables
ailing, ayling, bailing, baling, failing, flailing, grayling, hailing, jailing, mailing, nailing, paling, railing, sailing, saling, scaling, tailing, trailing, veiling, wailing, whaling
Three Syllables
assailing, curtailing, derailing, detailing, entailing, inhaling, prevailing, regaling, surveilling, unfailing, unveiling