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.
choirs chiros chorus chairs chirrs chores chirus chirres choreas chars shores charas chares shiers shirrs cheers shoers charrs shires churrs charros cheeros chorizo churros cherries cheerios shris shares shears sheers shrews tiaras sharias sherris shariahs sherries
noirs coirs choirs ors bores corse mores mires virus horsy morse liers ires sires moors cores lairs horse piers biros kirs sours birse horas roars giaours keirs gores hoars ores nairus lores kors boors pores noris sores yores weirs shores shirrs trois shiers chores torsi chirus chiros zoris worse wires whirs lours mirs dorsa gorsy doers torus soars tors birrs toras toros mbiras tires viers dorrs boars ours goers loris sirs dors liras deairs torrs airs tiros wairs hires chairs wooers whores mors moras torso gorse moires liars giros boras fiars pours fores iris pairs fours sorus hours koras fairs vairs cooers nairas cors quires firs kiers hoers oars guiros whirrs chirrs heirs mairs hairs cires vires zaires doors tiers tores torse tours biers fires chorus shires pooris shoers yirrs soras yours
choir chair chiro chirr chirre chiru chore chorea achier echoer ichor chichier