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.
dual dal dually dull deal dial dahl dale duel duly dulia daily doula dully dally duello dahlia duelli del dol diel tale dell deli tael tule doll dill tall tali dole deil tail dele teal diol tala doyly delay tally delly dooly dolly doily dilly tulle