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.
fiars firs fairs faros fears fares fires feuars ferias farrows fairies furs vars varas feres viers frays vires froes farci farce fores fours frass fries frise frows virus farcy varus frees vairs frowsy forays farcie varies fierce pharos vireos varias furies frisee fraise furrows furioso furious gharris foresee ferrous ferries various faeries ferreous gharries pharaohs pharisee friz
fiars liars ars mairs firs giros hoarse bears hares noirs arias bars arse airs haars lars iris mares coarse vairs keirs piers hires fairs guars vires kiers bares rias parse nairus cerias quires lares raias mires gars pariahs varias gnars faros wears dears charrs charas tars wares whirrs chiros tears chirus shares wires sharias shiers shirrs years yttrias rears tires dares oars cares parrs sears saris moires naris cars marse tares liras knaurs sirs paras hearse souaris ares biros hears roars gaurs wairs taros varas tiers soars shears gnarrs biers deairs saros paris virus pears nears chairs weirs ears mbiras hoars heirs coirs pairs maras birse fears birrs jars cires gears feuars carse ires fares viers chars tiaras vars kerrias hairs liers ferias pharos fires varus mirs choirs kirs lairs laris lears maars nairas guiros boars carrs rares zaires chirrs wars tiros tarsi tahrs sires mars whirs shires pars pares norias nares knars chares shariahs yirrs
fiar fir far fear afar firry fire fiery feirie faro farrow fare fairy fair faery faerie afire