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.
mutase muts mutts mauts mutes metisse medusae mads mots mats muds meads matts moats mates mitis mauds motes motts matza modus metes mitts maids meats moots meets mites metis meatus medusa mottes mottos mattes matsah medias mateys matzah medius maydays meadows metazoa middays mottoes muddies moieties
mutase tas teas betas betise bettas biotas botas tease etas footsie getas cottas pietas tace pittas potsie reatas riatas satays stays suttas ditas tats utas chetahs ketose tawse litas outsee tasse tass taos fetas iotas jotas taus katas quotas lotahs lyttas lotas taws pitas poetise raitas retuse rotas setose stoas zetas tads tootsie cheetahs shittahs
mut maut meta mute mutt smut smutty