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.
rugger rigger roguery raker rigor recur reeker regrow rocker regrew rigour racker recarry reekier require rockery rockier rookery rookier wreaker wrecker
agger dagger sagger tagger nagger lagger logger kegger nigger hogger gagger mugger chigger egger rigger jagger chugger bagger dogger wagger digger lugger jogger hugger jigger fogger bugger tugger rugger bigger baggier piggery naggier eggar saggar doggery waggery leggier vuggier leaguer puggier jaggery muggar piggier wiggier buggery seggar aggro jiggier muggier goer doggier foggier puggry fuggier boggier jaggier beggar muggur quaggier faggier saggier buggier wiggery loggier vaguer soggier toggery voguer shaggier
rug ragg raggee raggy reggae ruga rugae erugo frug drug druggie druggy trug