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.
preset prest purest presto priest pressed poorest preside prost prosit prised pursed prosed parsed purist perused precede praised prissed proceed pursuit presidio porosity presidia praesidia priced prized prosciutto prosciutti pierced prosody prostie pursued parasite persuade
reset preset fieriest forest merest arrest barghest airest wriest tarriest airiest miriest crest corset russety furriest goriest leariest verset serest truest breast sheerest charriest presto worset weariest nearest russet direst wrest drest purest erst rearrest sorriest surest hairiest cresset barest beeriest eeriest cruset verst hoariest roset freest driest resit reseat resat reest aeriest veriest queerest leeriest burriest searest rest dearest sourest sorest rarest merriest priest dourest fairest poorest teariest firriest wariest wiriest prest chariest cheeriest mooriest yarest
presa prese press apres priss pursy pores purse prase purees prez prossie preys proso prees pros pries peres perse parse pars pareus pares pareos prise prissy prose pross prosy purs pursue pyres sprees