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.
tensed tennist tensity teeniest deionized danced tanist density tannest tiniest toniest downside tawniest tenacity tinniest
lensed sensed rinsed tensed censed mensed finessed pounced minced lionised ensued fenced ponced ionised onset unissued jonesed jounced linseed winced unset unused moonset nosed quinsied lanced danced synced nuanced noosed moonseed sunset inset zinced aniseed bounced jaunced noised chanced
tense tens tuns tins dens dense taenias tans tansy teens teensy tenace tenias tennies tennis tenues tenuis tenuous tons stenos