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.
toluyl tolyl toluol toluole tallol telial
toluyl lull lulu allyl alula pilule cellule slyly toluol tolyl
tolu toil toile tola tole toll tool atoll stole