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.
horste horst horsed hirsute hurst hoariest hearsed hairiest harassed heroized
verste horste versed wrist verst prost arrest creosote jarosite corset airest rest purest wrest rust serest cristae hearsed first frost rearrest crust aorist tourist sheerest drest wurst worset dearest tryst trust karst pursed parsed direst nursed poorest curst sourest merest querist cerussite resite arrestee barest erst horst hirsute bursate crosstie sorest aristae verset purist forest burst coursed jurist crest hurst prostie horsed verist aurist cerusite fairest cursed periostea searest lyrist nearest surest grist prest parasite dourest rarest triste queerest trustee tryste diarist worst christie durst yarest
horse horsey horsy hers hoars hoarse hoers hoorahs hoorays horahs horas houris hours ahorse