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.
amass amas amahs amias amiss aims amis amus amaze ambos amies ammos amuse awmous
amass mass camass biomass mas moss lamas koumyss gummas gambas kumiss bemas moas koumiss gamays commas amias embassy lemmas amahs lamias limas llamas lumas mambas mommas nomas omasa pumas rumbas sambas somas zamias doumas shamas gamas limbas miss comas amas mays mess amiss hyphemias masa gammas muss maws bimas massy bimahs caeomas maes masse massa camas loumas mamas mammas nemas pneumas pimas remiss cymas simas summas zymase dumas shammas