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.
warrior worrier warier wearer wirier wearier woorari wirer
warrior barrier worrier terror tarrier priory parrier mirror merrier marrier quarrier currier hurrier burrier horror harrier furrier firrier farrier error prior sorrier terrier carrier charrier