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.
glairs glaires glares gluers claros clears claroes claries glories galores glorias galeres collars gaolers colliers couloirs glorious gallerias galleries colors collieries clours clerisy killers coolers cullers colours coalers callers colures coilers calories quellers
lairs glairs flairs lars clears liars pillars molars milliares glares collars hauliers lares jolliers laris colliers polars reliers salliers dollars talliers willowwares glaires lears liers milliers talars ralliers cellars blares beliers pliers mylars liras dalliers couloirs tolars malars hollowwares claros velars flirs fliers flares blears yellowwares
glair glaire glairy glare glary gluier gular aglare uglier