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.
saviours saviors savours savors savouries savorous savers savories severs sivers sofars safaris sighers suffers zaffirs suffaris
haviours paviours saviours fours furious various bifarious favours haviors nefarious paviors saviors savours devours dyvours
savior saviour savor savory savour savoury savvier