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.
tardy tardo tared tarty tarred teared trad turd tart trod tarried triad trode treed tarot tired trade dared trued tyred tried tread triode trouty toured tirade treaty toroid teredo tiered torrid deaired dart tort tret trot
hardy lardy pardy tardy wared shaird tared weirdy barde teared cared caird hoard bready pardi farad heard lard guard reared yaird shared laird corrody bared bard liard neared oared pared party rared roared sarod soared garda tardo chard arty fard shard hard wordy sard ward faraday beard eared parody perdy ready board geared card tarty chared arid seared grody hearty pard nerdy nard curdy sheared corody dared hared feared fared warty yard
tar tahr tare taro tarre tarry tear teary star stare starry tawdry