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.
flairs flirs flares fliers failures filarees fluors filers velars fleers flours floors floras fellers fuelers fowlers fallers fullers feelers fillers flurries fuellers fulleries fluoresce fooleries phyllaries valors valours valuers vealers veilers velours velures valorise valorous velarize voleries
lairs glairs flairs lars clears liars pillars molars milliares glares collars hauliers lares jolliers laris colliers polars reliers salliers dollars talliers willowwares glaires lears liers milliers talars ralliers cellars blares beliers pliers mylars liras dalliers couloirs tolars malars hollowwares claros velars flirs fliers flares blears yellowwares
flair failure filar filaree filaria filariae flare flier flir foliar