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.
oots oats outs ottos odious outsaw outsay outsee ods odas odds odes ouds odahs
boots cots shoots tots dots soots roots pots oots knots mots moots lots loots coots bots jots hots hoots phots foots riots rots sots toots wots shots