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.
timorous tumorous timaraus dimerous tumors timers tomorrows tumours timbres timbers tamaraus tambours tambouras dimers tamers dimmers tamburs teemers tamaraos tamburas damars demurs
amorous humorous timorous tumorous morose morros amoroso coumarous cumbrous numerous sombrous dimerous
timarau timbre timer tomorrow tumor