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.
pausal passel pusley pussly paisley piously pussley posole puzzle
causal pausal sal piously tousle dossal sale reseal sall resail casual usual saul seal ousel missal loessial sail nasal fusel assail vassal tissual sisal resale reassail basal housel loessal masala vasal phaseal fusil byssal visual tussal wassail
pause pas pus pease spas peas paps pays pussy paws poussie pias passe passee pass paseo pase paise paisa puss opus pups upas