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.
coirs cors corse cores course cooers coarse cris cars cuirass cowries kirs crus corries curs kors crows crass keirs croci currs cress carrs gorsy craws kiers gores gorse goers cross cries cures carse curse koras crews cruse cares caries crissa coerce curies creasy curios cressy crouse crease kouros coryza guiros quires caress creese crosse cruise carouse carries curiosa curious curries carious gars kris
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
coir cor core coria corrie cory cowrie cowry score scoria scoriae