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.
proud prod prude parody poured period parodoi pard pored perdy pruta pardy preed pried perdu pared pardi pride purda pirouette perdue parrot protea pardee pureed pardie parade protei paired perdie pardah parred purred peered purdah prutah parried parroty peridia pierrot proette priedieu part pert port prat
proud shroud rod crud road rude rudd rout rood neuroid rode corody fraud rued grout broad sarod sciuroid droid hydroid trod trout choroid gourd corrody viroid brood joyrode corrode crowd crude erode grody parody maraud period aroid prude sarode zeroed druid toroid trode trued prod byroad
pro pour prao prau proa prow pyro roupier sprue