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.
kudus kudos kudzu kids cuds quads guids quods gudes gauds kadis quids kiddos guides kiddoes quietus gaudies keddahs koodoos cuddies kiddies cads cods cuts gads gods guts kats kits
kudus dues quids guids gudes kudos cuds judos gauds nodous puds muds nudes rudds medusa suds mauds duads leuds duds lauds udos kudzu judas vodous ouds quads quods bauds buds iodous feuds fuds fatuous nodus radius duos nidus sudds modus sudsy medius dudes ludes tutus leudes yauds