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.
valours valors velours valuers valorous valorise flours velures vealers valorize failures fluors velars floras floors veilers fallers flurries voleries fluoresce flirs fleers filers flares fliers flairs feelers fellers fillers fowlers fuelers fullers
flours dolours colours valours lours velours clours galores allures floors pallors pylorus valuers floras colures lures dolors sailors tailleurs slurs soilures failures jailors loris gluers bailors blurs lores fluors velures couloirs colors valors pelorus tailors