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.
housesit housesat hissiest haziest
housesit assist sissiest rosiest pussiest noisiest necessity messiest lousiest mousiest basest bassist bossiest busiest easiest cheesiest wisest fussiest hissiest loosest sassiest resist nosiest newsiest mussiest massiest mossiest housesat queasiest goosiest gassiest cosiest coassist wussiest desist choosiest
houses hoises hoses hoseys rhuses