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.
parkas parks perks porks pargos pricks perukes porkies piraguas prigs progs percuss periques pirogues piroques
burkas charkas markas parkas dirks arks carks kirks araks larks berks burkes barcas orcas murks merks parks shirks chirks crags markkas porks seracs darks dorks dreks teargas troikas warks barks irks quirks quarks brags charks turks lurks borks drags sarks zerks rags perks groks birks narks treks sharks works taroks mirks marks corks burqas harks jerks virgas frags forks yerks
park parka pargo perk perky pork porky paprica paprika spark sparky