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.
fruit fruity frit fritt ferity forrit fort frat fret fart ferrite fried fraud forte forty ferret fretty verite verity ferrate ferrety ferried variate variety fard ford vert
bruit fruit rut druid trait rewrite diorite purity yperite norite periti frit cruet lariat brute chariot kraut grout fritt griot ferrite forrit cowrite ferity verity burrito fruity trout brit brut barite rout verite riot rite heriot quirt krait grit curite crit britt writ write merit parity pruta pyrite rarity cerite droit territ trite worrit charity