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.
zymase cymas zymes cymose zamias cymes simas smaze somas zooms cymous sambas summas zombis zombies
zymase mas limas moas caeomas summas nomas amahs bemuse mambas amass gummose mise amuse hyphemias bimas llamas lamias cymas gammas lumas amaze shammas pomace chemise whimsey amas doumas mace maze sambas ramose muse smaze gamays omasa rimose comose mommas pneumas comas camas mamas mammas bemas vamose loumas gambas zamias biomass amias commas mass camass bimahs maes camise nemas mays lemmas limbas pumas masse remise masa lamas pimas gamas cymose maws gummas somas demise rumbas dumas chamise simas shamas siamese