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.
reasoned resined resound rezoned reassigned reascend resigned resonate resend rescind rosined reascent resinoid resent resinate recent
masoned seasoned poisoned lessoned reasoned sned sonde sound loosened rezoned bausond resined saned zooned fissioned missioned missound lessened resound basined rosined zoned disowned
reason raisonne reassign resown preassign treason