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.
flans flanes felons flense felines fulness felonies villains fellness fullness foulness felonious villainess villainous villainies fallowness flounce fluency valance valines flouncy violins valiance valiancy valonias vileness villeins violones
alans uhlans xylans elans flans callans tolans yulans plans clans solans glans ulans lallans gallons talons pylons colons lianas plains blains cleans collins belons solanos billons moulins loans colins lens pollens reloans lauans planes ulnas tolanes woollens clons yeelins lianes salons kilns villains silanes bouillons ballons cleanse lins lawns violins flanes mullens kalians leans lanes paulins kaolins llanos halons melons felons nylons solons elains woolens gleans hyalins glens