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.
peers peeress peeries prees perse pears piers peris peres purees hypers perries purs pars pros proso pross pries pours pores puris pyres paris preys prows praus priss parrs proas purrs pares press praos pairs parse purse pyros prays paras prese presa prosy pursy porous prissy pursue pooris pareus parous pareos paries pierce peruse pariahs parries prez
beers cheers sheers queers deers jeers veers leers seers peers ers quaeres purees sers rears soirees hers prees ceres rees seres sirees brees verse lehrs bourrees sieurs ruers viers suers sarees shoers bears haeres wooers weirs trees terse drees cooers sirrees keirs ceros frees gears goers piers grees queuers nears eros lears xerus peres hoers cheeros creese sears feres hypers kiers zeros hears heres perse eras ears biers larees hirees meres verso peris pears liers heirs heros fears errs doers dears tears tiers wears wheres shears shiers years
peer peery peerie per pree peeper opera apery aper peri pier perry pereia perea pere pear speer