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.
druids druidess droids hydrids derides hydroids hydrides triads droits dreads toroids dorados dirties diorites darts drats dirts turds derats traits treads trouts derates tardies territs hydrates tortoise tortuous treaties treatise
druids bourrides marauds nereides curds grides crudes oroides nurds prides jerrids cairds irides derides sciurids brides girds rids hydrids rudds toroids hayrides turds birds ureides borides chorioids aroids shairds queridas yairds murids rides raids irids lairds myriads cruds gourds corridas oreides nereids periods jerids joyrides hurds surds prudes droids fruits braids hydrides frauds hydroids viroids triads burds urds bruits weirds hybrids choroids grids shrouds marrieds yirds
druid deride dried droid droit