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.
halons haleness hellions hollowness holiness hilliness
ballons salons colons pylons halons solons felons melons gallons belons billons nylons talons bouillons clons loins xylans kaolins violones hellions lions elans eloins billions alans flans lins ulans tolans pillions millions galloons kilns clones lens colonus saloons paulins reloans mullens woollens solions shalloons jillions yeelins talions woolens violins lallans gluons solans clans clonus plans collins loons colins moulins leones mullions colones zillions uhlans ulnas aloins pollens glans callans loans glens cullions bullions pleons clowns chalones galleons hyalins balloons yulans