Idyll rhymes with:
bridal, bridle, freidel, geidel, heidel, homicidal, idle, idol, intertidal, keidel, lydall, reidel, scheidel, seidel, seidell, seidl, sidell, sidle, speidel, spidle, steidel, suicidal, tidal, weidel
Idyll sounds like:
idalia, ideal, ideally, idle, idly, idol, idola, it'll, italia, italy, itel