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.
tapes taupes taps tawpies tapas types tapis topes topees tepees daps tips tups teapoys tops toupees teepees tipis typos tepas dopes topis topos dupes tipsy typps tepoys diapause toepiece dips dups
apes gapes tapes napes japes shapes chapes capes rapes pes copes maps knaps buppies apps wipes caps paps tapas pipes rupees koppies popes papas pehs nappies baps veepees spues cepes lapis whoopees jupes dopes kapas haps taupes topees yippies yawps yaps nappes cheaps cheapies chappies zaps whaps waps toupees tapis hoopoes teepees soaps hypes napas saps pies spews opes gaps pappies peso mopes capos kewpies sipes spaes naps ripes chippies peps apos daps neaps cowpies reaps dupes jaups loupes hippies rappees pees heaps cowpeas ropes lapse laps pews hopes poppies apse puppies tawpies gawps spies peas guppies coupes supes lopes raps wraps leaps epees tepees taps topes types weepies whaups whoopies copies chaps cheapos shoppes yaups yipes yuppies
tape tap tapa taupe tawpie teapoy tepee tope topee type typey atap etape