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.
mottos mottoes motts mottes mots motes moots mutts moods moats mitts matts mattes muts mods mats moieties modes modus meets meats metis mitis mates mites mauts metes mutes mateys matsah meatus mutase meadows metisse
ghettos ottos pottos dittos mottos dattos lottos taos mottoes tattoos tots bitts netts jatos mattes motts lyttas kotos fouettes tits setose tuttis ratos rotos kowtows setts stoss suttas buteos fyttes toes bettas vetoes mitts batts shotts ghettoes chotts kotows riotous toys botts tats tods tows photos cottas mottes mutts ketose lattes autos tets tuts watts pittas putts buttes rottes setous stoas stows datos patois lotos matts butts lottes toss yetts
mott motte motto mot matt matte mitt moat moot mote motey mutt emote smote