I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
plumb plum plume plumy pileum plummy pallium palm palmy
plumb lum volume helium hilum ilium climb coulomb velum kalium glum pallium plum phylum pileum plume relume slum telium nelumbo vellum folium ileum lamb filum blume alum allium luma oleum limb illume clomb gallium glume milium flume plumy cilium solum chillum