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.
latria later latter lader lidar liter litre lauder lotter litter loiter ladder letter loader looter leader leadier littery lottery
yttria stria nutria atria latria straw tuatera satori tetri satara datura hysteria sudaria tori tray hatteria trio stray striae betray sutra tora tetra hydriae tuatara hydria uteri
lat blate slatey slat platy plateau plate plat flat elate blat laity alate latu latte lati late slate slaty