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.
hydroids hydrids hydrides droids droits druids toroids derides druidess hydrates triads dreads dirties dorados diorites tortoise darts dirts drats trots turds derats tarots traits treads trouts
aroids droids choroids viroids hydroids toroids rids rods jerrids corridas byroads grids broods irids queridas murids erodes crowds hayrides hydrides braids marrieds myriads oroides periods prods sarods brides triads droits prides hybrids roods chorioids raids bourrides corrodes hydrids rodes irides borides jerids rotis sciurids druids grides rides joyrides broads roads nereids parodos sarodes derides shrouds
hydroid hydrate hydrid hydride