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.
tombacs tombacks tambacs tombaks tambaks
tambacs tombacs macs macks iambics oomiacs smacks sumacs tambaks tombacks tombaks umiacs
tombac tomback tombak tambac tambak