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.
lucre ligure luckier lycra lacker licker liquor locker lugger leaguer liqueur
lucre sucre decare fiacre scree scare ocrea core crew cure curie quare care quire secure ligure acre maugre mucor mucro nacre require score screw soucar squire figure square daycare decree
luck luckie lucky cluck pluck plucky