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.
trudge drudge targe dredge triage dirge tragi dragee
grudge drudge trudge ridge rouge bridge fridge gurge parridge porridge purge surge dredge urge
true rudder ruddier ruder rudery