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.
creeks creaks carks corks crocks cracks crucks crakes crooks cricks croaks caracks cargoes carracks carex crags crocs kirks groks cargos crocus gregos quarks quirks carcase carcass croquis cariocas curacaos curacoas garigues karaokes
breeks reeks creeks creaks shrieks jerks dreks phreaks zerks freaks merks marquees berks breaks wrecks wreaks recks rakees raggees perks drecks treks yerks
creek creak creaky greek screak screaky