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.
messiest massiest mossiest mussiest mousiest maziest muzziest mysost
bossiest lousiest cheesiest wussiest goosiest hissiest pussiest mossiest noisiest newsiest mousiest fussiest choosiest rosiest messiest sassiest mussiest massiest queasiest cosiest busiest easiest nosiest sissiest gassiest laciest bassist fuzziest foziest muzziest iciest loosest doziest wooziest wheeziest desist sauciest housesat whizziest assist basest coassist ooziest choicest queaziest booziest nicest diciest resist coziest fascist zooiest jazziest juiciest siesta dizziest laziest casuist paciest fizziest wisest raciest gauziest chicest haziest maziest siziest
messiahs mesas messes missies missis emesis tmesis