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.
bubus bubs boubous babus bubbas buboes bibs baubees bobs bubbies babes bibbs babas boobs baboos babies bawbees beebees bobbies boobies booboos booboisie
rubus bubus bus tubas bubs cubes daubes subs rebus fubs pubis dubs tubs jubas lubes gibbous hubs habus phoebus fubsy nubs abuse boubous buys rebuys zebus subas rubes babus rubs cubs niobous pubs jubes buss busy pubes daubs tabus tubes chubs
bubu bub baubee boubou bubba bubby bubo