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.
caviars caviares cavers covaries covers kafirs kaffirs quavers coiffeurs coiffures kefirs coffers gaffers quivers
caviars vars saviors paviors navars liviers leviers caviares haviors bouviers virus vires viers varus varas vairs fiars reovirus devoirs