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.
flares filarees flairs flirs flurries failures velars fulleries fluors fluoresce floras fleers flours filers floors fliers fooleries phyllaries fowlers velures fuelers fillers fellers fullers feelers fallers fuellers velarize voleries valors valours valuers vealers veilers velours valorise valorize valorous
lares blares flares glares yellowwares hollowwares milliares willowwares velures helleries collieries talars milreis lars fooleries failures clears lorries colures filarees fulleries glories phyllaries pillories lories flairs lures lears galores glairs calories galeres lyres glaires claroes voleries liars flurries dollars railleries claries tolars collars cellars laris allures velars claros galleries mylars soilures sealeries slurries larees lairs lores blears malars milliaries molars pillars polars celeries salaries
flare filar filaree filaria filariae flair flir flora florae flurry