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.
nairas nairus gnars knars nares naris nears noirs gnarrs knaurs norias narrows knurs noris nurse nereis
mbiras liras nairas ras quires gyrase eras brass brays gerahs firs guiros varias rase morass muras raias raws rias birrs hairs bras craws phrase proas pariahs mairs mirs hurrahs moires vairs giros horahs lauras grass ires frays rais kerrias liers coirs noirs praus cires wairs duras tiros trays whirs chairs chiros dourahs urase chirus choreas sharias shires tiers tiaras whereas hydras airs draws praos sirs sirrahs sierras kirs eyras deairs heirs toras rays surahs pairs boras surras fires forays braes terais horas prays cerias piers bewrays boreas hoorays mirza maras grays nairus areas erase morays buras varas biers frass braws cuirass koras hoorahs arras fiars vires harass auras moras keirs iris birse hires arias hurrays jarrahs mires lairs viers norias terras liars virus prase soras sirras sires murras biros derays drays fairs crass suras paras kiers zaires arrays ferias trass hydrase douras whirrs weirs durras torahs yttrias wires charas serais chirrs ureas choirs shariahs shiers shirrs tires yirrs
naira nairu gnar gnarr knar knarry narrow nary near noir snare unary