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.
perinea purine pereion prone prion paranoea prune purin pyrene pirana purana parian perron pernio pereon pyrone hyperon pirn porn paranoia porno porny prawn preen pyran
perinea cornea chorine triune triene taurine serine purine neurine murrine murine moraine marine marina brine larine carinae carina jarina heroine hariana ferine narine farina sciurine dourine terrine trine urine shrine rin