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.
fiord ford fired fordo faired foredo fard fort farad virid fraud fared forty forte freed fried feared forrit furred viroid faraday ferried fart frat fret frit
fiord fordo heired orad pored paired sord liard mired laird triode deaired weird cored weirdy gourd irid wired caird wordy hoard choired hired chored horde shaird haired yaird hairdo virid ford quired fired bored ordo sired period sored lord moored laired waired tired weirdo gored aired whored gird word cord chaired bird chord board chorioid ired shored faired yird
for fir afore afire four forwhy fore foray firry fora fire fiery fiar feirie fairy fair ivory