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.
tonneaus tonnes tonus tones donnas tineas tons townees tunnies tennies townies donnees toonies tunes tines tynes tunas toons towns donas tenuis tenues tauons tenias tennis donees tawnies duennas tenuous tannoys dunness tawneys taenias tans tens tins tuns dons downs denes dynes dines tains tansy tense teens deans donsy dunes denies dienes donsie teensy tenace
tonneaus aeneous aeneus guineas hyponeas tineas unaus unease uneasy nus
tonneau tonne tone donne donnee toney townee atone stone stoney ton