Lengthy rhymes with:
abernathy, abernethy, antipathy, apathy, athey, athie, breathy, cathie, cathy, cinthie, cynthie, dorothy, dorthy, duthie, earthy, empathy, encephalopathy, fathi, filthy, frothy, healthy, homeopathy, hyacinthie, kathi, kathie, kathy, luthy, lymphadenopathy, maccarthy, manthey, mathie, mathy, mccarthy, mccauthy, mcconathy, mcquethy, mcwethy, mouthy, murthy, neuropathy, olathe, penberthy, pithy, psychopathy, ruthie, sethi, smithey, stealthy, sympathy, telepathy, timothy, toothy, unhealthy, wealthy, withey
Lengthy sounds like:
lamaist, lanai-city, lancet, lancit, lanctot, langguth, langseth, languid, languished, lanzet, launched, leanest, length, leninist, linguist, linked, linquist, linscott, linseed, lionized, longed, longest, longitude, longshot, longuet, longwood, lunched, lunged, lynched