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.
plant plaint planet pliant planate planed plenty plained planned polenta pollenate pollinate palinode pollened
alant sealant gellant coolant gelant plant volant gallant callant slant gallnut blent lent lint aland lalland eland slanty leant flint eluant reliant land talent glint walnut flaunt soland reland relent silent elint blunt lowland gillnet violent gland bland holland lunt plaint valiant planet volante telnet pliant cholent