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.
cheesiest choosiest chicest choicest
cheesiest queasiest gassiest wheeziest sissiest rosiest pussiest noisiest mussiest mousiest mossiest messiest massiest lousiest goosiest bossiest siesta cosiest hissiest fussiest easiest busiest newsiest nosiest resist sassiest desist wussiest choosiest