Cineplex rhymes with:
adaptaplex, adaptaplex, duplex, mediplex, metroplex, multiplex, simplex, starplex, timeplex, adaptaplex, berlex, duplex, mediplex, metroplex, multiplex, oraflex, simplex, starplex, stratoflex, teleflex, telex, timeplex
Cineplex sounds like:
camouflage, campbell's, campbells, cannibalize, cannibals, chambless, chambliss, cineplex's, commonplace, compels, compiles, complex, complexes, complies, conable's, convalesce, cosmopulos, cymbals