Derailing rhymes with:
grayling, railing, trailing, ailing, assailing, ayling, bailing, baling, curtailing, detailing, emailing, entailing, failing, flailing, grayling, hailing, impaling, inhaling, jailing, mailing, nailing, prevailing, railing, regaling, sailing, saling, scaling, surveilling, tailing, trailing, unavailing, unfailing, unveiling, veiling, wailing, whaling
Derailing sounds like:
darling, darlings, dreiling, drilling, drilling's, drooling, durling