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.
seracs cercus sarcous sargasso sarks zerks surrogacy sargos sorgos
seracs barcas fracas burqas frags brags barracks burkas orcs circus reracks darics narcs mercs durocs marcs teargas lyrics torics crags tracks hayracks turacos carracks racks rags orcas cracks recs rocs virgas araks arcs wracks parkas arracks cercus arcus drags narcos tarocs markas torcs maracas touracos crocs triacs caracks charkas