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.
platys plats pleats plaits plates palates platies plots pelts playdays plateaus pleads palets poults pilots palliates plaids pluteus pullets pelotas pellets piolets pallets pleiads pelites pleiades polities pullouts payloads pollutes palettes plotties plods plotz palletise pallettes pelletise politesse palladous paillettes ploidies poultice
platys elates valuates bleats bloats blats palates plats plaits playdays malates malts gallates relates salts cleats slats gelatis zlotys halts delates holydays toluates alts chelates balatas lats fellates pleats foliates flats filiates flatus oleates plates palliates alates gloats maleates collates ciliates eluates gelatos slates gelates solates violates dealates holidays dilates folates welladays floats cholates
plat plate plateau platy palate pelt plaid plait playday plead pleat plot plotty plutei splat