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.
cannot cant connote canto canty gannet canoed canned connate cunt condo conte caned canid count candy quant gaunt conto qanat quanta conned conoid county kainit quaint ganoid coontie cuneate gahnite kainite keynote quinnat
cannot not sonnet snot sennit cenote rennet punnet linnet quinnat keynote gannet connote jennet bennet bonnet bannet nowt note nota knout knot pinot rainout runout sennet snoot snout denote
canna cannie canny can cain cane canoe conn scan