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.
savor savior savory savour saviour savoury saver suaver savvier safer sever siver sofar safari severe soever suffari
favor savor weaver dyvour devoir savour aver paver newwaver navar leaver laver quaver ivory caver heaver raver haver favour bevor beaver pavior reaver savior havior saver savory suaver devour waver shaver