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.
tercel tiercel tersely triscele tressel hydrocele dorsel tarsal trysail
carcel marcel parcel tercel tiercel fiercely hirsel morsel dorsel hydrocele triscele wurzel
terce terse tetris terais terrace terras terrazzo terries tears tiers tierce trace trice truce stereos steres tetras uterus