Nilly rhymes with:
vanilli, achille, alfavilli, billie, billy, bily, briley, camilli, chantilly, chile, chili, chilly, cilley, crilley, crilly, dilley, dillie, dilly, filley, filly, friley, frilly, fusilli, gilley, gillie, gilly, grilli, hiley, hilley, hilly, killey, liley, lili, lilley, lilli, lillie, lilly, lily, milley, milli, millie, milly, philley, phillie, philly, pilley, really, rylee, shiley, silly, smilie, smillie, smylie, smyly, stilley, swilley, tilley, tillie, tilly, twilley, vanilli, vassily, villi, willey, willi, willie, willy, wyllie
Nilly sounds like:
nail, naill, nale, nall, nalley, nally, namely, neal, neala, neale, nealey, neall, nealy, neel, neeley, neely, neil, neile, neill, nel, nela, nelia, nell, nella, nelle, nelli, nellie, nelly, neola, newall, newell, newhall, newill, newley, newly, nial, niall, niel, niemela, nil, nila, nile, nill, noel, noell, noelle, nohl, nola, nole, nolie, noll, nolla, nolley, nollie, nolo, nominal, nominally, nowell, noyola, nuala, null, nunley, nunnally, nunnelley, nunnelly