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.
rotor retore router rotary rooter rioter rotter rootier rater retry ritter ratter retire retear writer rattier retiree reutter rowdier ruttier
motor rotor tor tooter story suitor odor footer sautoir quoter door gator doter tutor viator foetor vetoer fetor faitour tour bettor tory hooter tore toro meteor mooter noter satori rioter tori rooter retore quittor tora looter cooter voter torr store stour detour tattooer toter shooter
roto rot protei grotty grot rato riot rood root rooty rota roti rote rotte rout route wrote brood broody grotto protea trot