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.
shirks chirks sharks shrieks shrikes charks shrugs charkas
irks birks chirks mirks shirks quirks dirks kirks porks sharks jerks parkas araks lurks wricks burkas parks darks trikes arks sarks dreks perks borks barks carks murks narks berks charkas hayricks shrikes ricks shrieks bricks pricks larks turks charks groks merks marks markas cricks forks troikas harks quarks burkes corks tricks zerks derricks dorks taroks treks warks works traiks yerks
shirk chirk shark shriek shrieky shrike shrug schrik