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.
rakus racks rakes rakis ruckus wreaks rakees wracks raucous rugs rags reeks recks rooks raggs ricks ragas rykes rucks rocks rugous rugose rekeys wricks rogues wrecks recuse roques rax reggaes raggies rickeys raggees rookies recs regs rigs rocs roux
hakus rakus macks cakes gauss kues jacks backs bakes makes auks jauks knacks cause lakhs packs lacks daks quacks sakis yacks kakas beaks because wracks sacks rakes shakes soaks degauss takas teaks wakes whacks peaks magus jakes quakes lakes gawks makos rakis haiks fakes hacks vagus hawks haikus hakes jukus leaks kagus oaks paiks dawks shakos shacks wauks wacks takes tacks soukous kakis skuas sakes wreaks ruckus kaiaks racks yaks
raku rack rake rakee raki arak brake braky crake drake