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.
stopes stops stipes stapes stoops stoups stowps stupes steppes steps setups situps steeps stupas
dopes topes stopes metopes biotopes taupes neotypes teepees potpies topos retypes tepees tops biotypes stoops cotypes stops stowps watapes topees stoups types autopsy dupes tapes tawpies atopies topis netops etapes toupees steppes stapes dopas stipes retapes stupes wattapes
stop stope step steppe stipe stoop stoup stowp stupa stupe estop