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.
wreaks wracks wrecks rakus rakis reeks rakes racks recks wricks rakees rekeys reggaes rags recs regs rocks ricks raggs ragas rucks rykes rooks rogues roques ruckus recuse raggees raggies raucous rickeys rookies rax rex
beaks teaks wreaks peaks leaks reeks queasy daks pecks jacks decks fakes jakes hakus sacks packs degas hacks sakis oaks keas macks geeks paiks peags rakes hawks yaks sheiks shakes cheeks whacks weeks wakes wracks cakes soaks fecks hecks pekes keeks takas makes knacks neuks leks ekes leeks tacks wrecks necks quakes zeks rakus hakes kaiaks kecks kakis takes sakes dawks auks backs haiks seeks becks makos dekes lakes bakes lakhs kakas rakis racks jauks gecks lacks peeks wacks quacks wekas recks checks shacks gawks shakos yacks wauks yeuks
wreak wrack wreck break freak freaky creak creaky reargue rerack