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.
valance valiance valence valiancy valency valines violence flanes villainies villainess flounce villains vileness violones valonias flans fallowness villainous flense felines flouncy fluency fulness violins
lance valance glance balance planes dalliance silence silanes reliance valence violence valiance flanes alliance launce lanes tolanes