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.
fizziest fuzziest foziest fussiest fascist
fizziest whizziest jazziest dizziest booziest queaziest ooziest haziest wheeziest maziest wooziest gauziest siziest fuzziest doziest laziest foziest coziest muzziest zest choicest sassiest sissiest sauciest messiest nicest massiest easiest cosiest zesty mussiest siesta noisiest hylozoist fussiest mousiest gassiest mossiest cheesiest iciest zooiest hissiest chicest lousiest raciest newsiest diciest nosiest goosiest busiest paciest bossiest rosiest juiciest wisest pussiest wussiest laciest queasiest choosiest