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.
huipil hiply happily haply hoopla hopple
huipil hiply uppile spoil spile speil soapily roupily ropily pupil pipal peppily nippily loopily happily pail pily pill pili pile pial sappily spail spiel spill dopily choppily
hip hup hippie hippo hippy huppah