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.
firry furry fairy fiery ferry fir fry fire furrowy fray fury fiar fair faery foray gharry feirie forwhy furrow farrow fur far for fer fro very fare vair faro frae fere fear free frow fora fore froe vary four vier
firry whirry quarry airy curry kerry array berry jerry burry sorry fairy lorry dairy serry perry diary knarry terry murrey whirr wirra worry cherry chirre shirr merry carry birr parry gurry hurray herry hurry hairy gharry sirra harry fiery surrey cirri derry murry tarry miry wherry marry furry ferry wiry charry chirr sherry yirr