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.
witney witan whiten widen wheaten
jitney witney chutney butane cottony ketone tiny tone phytane tony tune toney satiny litany tine ratine stane poutine stoney neoteny dittany mutiny tetany chutnee retine tyne buttony patine betony attune botany retene retune ratany soutane atony stone butene muttony stony mutine duotone kidney atone tawney cetane routine ketene
wit wait whit white whitey whity wite witty twit