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.
flatus flats floats folates flautas flits felts foliates filiates fellates fluyts flites filets fluids flouts flotas flutes fleets flytes faults fillets fallouts violates valuates fluidise fealties volts folds valets voltes fields floods felids faulds vaults valutas velites violets volutes fluidize veloutes
flatus blats belauds alts gluteus oleates maleates palliates collates gallates gelatos plats plateaus pleats gelates halitus relates folates salts valuates slats lotus dealates alates dilates bleats chelates balatas lauds bloats halts boletus eluates gloats malts malates palates cleats cultus gelatis plates plaits platys violates lats pluteus floats ciliates foliates slates filiates solates fellates delates flats toluates elates cholates
flat felt flauta flit flite float floaty flota flute flutey fluty flyte folate