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.
fount font found fond fund fundi fondu feint vaunt faint funned vaunty finite fondue foined phonate vauntie fend find vent
fount mount count dunt unit sound daunt runt snout punty round point punt gaunt county lunet chaunt nonet hound mound lunt quint conte hunt vaunt conto junto joint jaunt wont haunt quant bound bunt knout biont vaunty bounty aunty font cunt found jaunty aunt onto junta monte pound punto rainout runout runty snouty suint donut taunt unto wound shunt
fun fon faun fauna faunae fohn foin funny