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.
tierce terce terrace terse truce tiers trice trace tries tears tires tiros trees terais terras tories triose tarries terries terrazzo
fierce terce coerce pierce tierce peres haeres terse brace farce mercy seres perse force quaeres cerci truce trace terrace feres grace farcie meres price ceres source rice verse heres orrice race trice wheres
tier stere titre titer tetri tetra stir stereo tiro tear tire terry terrae terra terai teary uteri