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.
chirp chirpy chirrup chirrupy charpai charpoy sharp sharpy sherpa sharpie
chiro chirr chirre chiru churr ochry chorea ochrea chore achier choir shire cherry chair chary char churro charry shirr charro ochre charr ochreae chare chichier