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.
topos tops typos topis topes topees tepoys tips tups taps teapoys toupees tipsy dopes tapas dopas topaz tipis tapes tepas tapis types typps depose taupes tepees tawpies teepees toepiece daps dips dups
topos ops lops loops poos coops repose poohs reoppose coups poops sepoys roups cops pappous opus pappoose goops pois sops hops hypos chops mops wops whops teapoys typos appose hoops pows oops topes posy lupous dopas pose suppose pops repos kops hopes lopes coypous papoose apos pappose topis hoopoos copes popes pepos popsy hoopoes biopsy oppose capos fops hippos copse epos soaps bops soups mopes depose hyssops knops dopes ropes opes tops whoops loups woops cheapos tepoys shops
topoi topo top tepoy tope topee topi toupee typo atop atopy stoop stop stope utopia