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.
attire attar adore aider atria auteur
attire retire satire tire mitre tree bittier stair suture tiro stere couture wittier sautoire doughtier quatre goutier tier tare dire future nuttier shittier titre dotier mitier cattier tore rattier knottier nature store metre peatier pitier poutier retiree rootier matier nitre hootier gnattier true footier feature metier trey meatier tattier sootier nittier retore stir battier zootier sautoir strew tyre haughtier chattier jettier nettier ruttier guttier puttier pottier pettier outre litre nattier whitier fattier mature goitre cottier stare dottier shoetree