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.
nutria neuter nutter nuttier niterie niter nitro nuder nitre noter nature notary nitery natter netter neater knitter knotter nattier nettier nittier gnattier knottier
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