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.
medusa medusae medius meds modus meads meeds meatus medias mediacy meadows muds mods muts mids mads mates meets motes metis maids mauds mauts mites metes midis moods mutts mutes meats modes mattes matsah mateys mottes maydays metazoa metisse middays middies mottoes muddies moieties
medusa dues duos vodous iodous kudus medius medusae modus nidus nodous nodus radius duds
med mead meadow meadowy media mediae medii meed meoued emeute