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.
lehrs lears leers liers lars lures loris lores liras liars laris lares lairs lours lyres larees lauras lories lorries
lehrs ers meres kiers bears errs feres veers verse wheres verso hypers fears heirs heros hoers jeers goers haeres zeros wooers piers shris shiers seers shears cheeros peris ceros terse ruers wears sers peers suers deers tahrs viers queers eros quaeres hears heres hers cooers ears nears weirs gears queuers leers eras lears buhrs biers liers beers xerus keirs tears doers dears sieurs pears seres tiers rears ceres whirs peres chars cheers sears sheers shoers perse years
lehr lear leary leer leery lier