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.
hiply haply huipil happily hoopla hopple
hiply ply poly ploy play pily paly reapply ripply reply roupily soapily supply deploy duopoly choppily apply haply byplay happily huipil loopily nippily peppily pipal replay ripely ropily sappily splay deeply dopily cheaply shapely