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.
meds meeds meads medius medusa medias mids mods mads muds medusae meadows moods modus midis meets mites modes motes meats maids metis mutes metes mates mauds meatus mattes mateys mottes maydays middays middies metisse mottoes muddies mediacy mats mots moieties muts matts mauts mitis mitts moats moots motts mutts
beds eds weeds teds feds feeds heeds geds coeds meds meeds needs peds reds reeds seeds zeds deeds weds sheds