Willow rhymes with:
kilo, afterglow, airglow, aloe, angelo, barkalow, barklow, barlow, barlowe, barrilleaux, bigelow, bordello, brownlow, buffalo, bungalow, carlow, cashflow, costlow, denslow, fallow, farlow, fishlow, fontainebleau, furlow, goodloe, goodlow, hollo, inflow, kilo, kinslow, ludlow, marlowe, michelangelo, nicklow, outflow, overflow, parlow, parslow, partlow, peglow, peplow, piccolo, ramlow, rushlow, solo, tarlow, titlow, tupelo, wadlow, wardlow, whitlow
Willow sounds like:
waal, wahl, wahle, wail, wal, wala, wale, wall, walla, walle, walley, walleye, wallie, wallo, wallow, wally, waylay, we'll, wehle, weil, weill, well, welle, weyl, whale, whaley, whalley, wheel, while, who'll, whole, wholey, wholly, wil, wile, wiley, will, willa, wille, willey, willi, willie, willowy, willy, wily, woehl, wohl, wola, woll, wolle, wool, wooley, woolley, woolly, wooly, wuli, wyle, wylie, wyllie, wyly