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.
nairus nairas gnars knars nares naris nears noirs gnarrs knaurs narrows knurs noris nurse nereis norias
virus nairus chirus mairs kiers parous kirs hairs ferrous coirs cerous rues gurus lairs furious choirs iris varus cires fires cruse piers grues gyrus cirrus hires shirrs trues kurus sirs chirrs chairs vires whirs weirs deairs urus shiers fiars tires torous moires hydrous praus xerus fairs pairs mires serous birrs liers cereus ruse ires cirrous keirs aurous biers chiros various peruse guiros aureus sires pareus carious biros quires nairas airs firs druse liars curious giros ceruse serious heirs noirs birse sorus porous viers wires tiros vairs tiers liras truss zaires wairs whirrs mbiras crus mirs chorus shires torus yirrs
naira nairu gnar gnarr knar knarry narrow nary near noir snare unary