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.
colures colours clours colors claries coolers collars coilers coalers collieries calories couloirs colliers colorize gluers glares clears galores glories glaires gaolers galeres cullers clerisy claroes callers calorize galleries claros glairs glorias killers
lures soilures velures failures colures allures fluors dolours lores slurs lours gluers blares galores valours colours clours velours lyres blurs galeres flares glares valuers milreis lares flours tailleurs