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.
dipsas dipsos diapauses deposes tapises
dipsas paisas psis psoas apses apsis copses lapses lapsus ripsaws sepses sepsis dipsos whipsaws woopses
dips dipso daps diapause dups tips tipsy adipose adipous