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.
regal regale regalia regally rugal recall recoal reglow reglue reguli recoil rugola wriggly
legal regal egal gal vagal squeal fugal rugal fecal caecal jugal gall faecal gaol gale gala regale begall cecal goal decal
reg raga reggae ruga rugae wreak break freak freaky creak creaky grego reargue rerack dreg dreggy