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.
rondel roundel rondelle roundelay roundly rundle rental riantly
rondel roundel wandle dindle soundly sendal rundle candela fondle fondly vandal handle nudely hondle bundle kindle indol kindly lintel mantel nonideal bindle candle poundal roundly sandal snidely dandle unideal windle
rondo rondeau rand randy rend rind rindy round rynd frond front ironed pronate pronota pronto droned