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.
weirs wears whirs wires wairs wheres whirrs wooers wearies wars whereas wherries whirries wares worse warsaw whores worries
keirs heirs weirs ers deairs fires cires hires errs gears sers cooers peres mbiras bears moires liras liars beers eras lairs feres tiers jeers tears viers nairus heros hypers suers mires queuers ears quaeres whirs years wheres shirrs shiers wears shears chirus sires chiros cheeros ceres wooers nereis kiers reis fears vairs zaires deers ires seers birse pears perse tiros eros fairs guiros sieurs leers noirs heres veers mairs biers firs verso virus coirs rears mirs ceros kirs ruers lehrs hairs haeres liers quires meres verse vires peris nears fiars biros hears hers lears sears hoers iris peers wairs nairas zeros xerus goers dears piers terse seres giros sirs airs whirrs queers wires pairs chairs cheers doers chirrs choirs tires sheers shires birrs shoers yirrs
weir wair wear weary weer were where wherry whir whirr whirry wire wirra wiry ewer