Illegal rhymes with:
extralegal, fleagle, flegal, fliegel, legal, paralegal, beagle, beegle, biegel, briegel, diegel, eagle, extralegal, feagle, fiegel, fleagle, flegal, fliegel, heagle, hiegel, keagle, kriegel, legal, neagle, paralegal, reagle, regal, reigle, riegel, riegle, seagle, segal, segel, seigal, seigle, siegal, siegel, siegell, siegle, speagle, speegle, spegal, spiegel, steagall, steagle, striegel, teagle, weigl, weigle, wiegel, yeagle