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.
stilly still sootily stull stile stall steely stella seedily style stole setal sidle stela stele steel sadly stale sotol stool steal styli sedile seidel settle stelae stelai cedilla sedilia steelie stoolie
dilly stilly dolly dully gaudily medially latilla moodily cattily caudillo idly nattily mutually nodally still pettily vitally seedily fatally ruttily shadily feudally retally bawdily rowdily tuille readily wittily beadily telly dottily dowdily tidally totally tally till headily giddily radially dually ideally nuttily knottily needily coitally doily caudally muddily meatily modally goutily haughtily dill reedily fattily weedily tidily tattily doughtily taille daily sootily fitly bodily cedilla delly ruddily dally ritually chattily shoddily