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.
rotten ratten written ratteen retene rattan ratton routine rattoon reattain radon redan redon rutin ratan redden redeny retune redone rhyton retain ratoon ratany retina retine ratine ridden retinae retinue
batten gotten rotten latten ratten fatten kitten shotten sitten litten patten mitten written bitten ten eaten heighten quieten beaten lattin poteen button gittin neaten lutein laten stein tauten ratteen whiten sateen rattan ratton cotton paten catena neoteny retene jetton butene potteen boughten mutton ketene mattin teen steno wheaten oaten lateen
rotte rot protei grotty ratty riot root rooty rota rote roti roto rout route rutty wrote grot grotto protea trot