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.
poured pored purred pureed purda pared proud pried preed peered purdah parred paired parried prod pard port priedieu pardy pardi perdy prate prude purty pride pirouette pyrite pretty period parade pirate purity pardee perdie protei protea parody pardah pardie perdue parodoi peridia proette yperite
cured soured lured mured toured poured loured dured urd red aired parried haired greed brede caried buret veered furred garred hared faired redo cried freed preed queered peered tyred pored quired mired gyred ferried rared married redd knarred reread birred cared erred jarred curried parred tried berried queried foredo dreed uredo whored worried deaired chared tiered burred choired cheered churred teared sheared treed shirred shred tiaraed seared wearied dread tarred jereed purred wared trued burd soared lurid pureed whirred heired zeroed bred serried oared curred read feared cred neared guard gored buried curd geared marred hurried eared curdy creed tarried paired fried pared cored gourd credo hired jeered juried dared tired wried gnarred dried quarried reed gourde carried oread jerreed leered bread harried murid cered pried laired bored fired moored wherried breed waired tared curet purda fared aeried barred sired reared nereid turd herried teredo ired bared rede rued sciurid chirred varied whirried wired roared chaired surd sered charred warred chored sored shared nurd sheered shored shrewd tread yirred
pour pur poor poori pore pure puree puri purr aporia spore spur spurrey spurry