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.
markas markkas marks maracas margays mirks murks merks marcs marques marquis myricas marquees marquess marquise mercs morgues
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
mark marka markka markkaa maraca marc margay marque marquee merk mirk mirky murk murky