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.
preach preachy parch perch porch preshow parashah parritch parish perish poorish
reach breach preach parch search mariachi arch larch creche caroach huaracho huarache earache broach breech brach retch wretch reechy reecho ratch cratch currach march merch orache perch roach orach preachy dreich
para pore spray repair reaper puree proa prey pree pray prau prao pereia parae perea pere pear pareu pareo pare pure pyre reappear spear spree