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.
xenias sennas scenas zinnias siennas snaws zeins sense sensa cense sensei zanies scenes seines sanies sunnas saunas sanious senecio sonnies sunnahs
manias tenias taenias zinnias xenias lenis hyponeas ionise loonies finis phonies pinnas boonies ranis bennis vinas donnas kanas lianas nans minis meinies jinnis sennas goannas hennas ponies sonnies mannas peonies denies lunas nonas gunnies pinas ennuis hyenas shinnies shannies wienies whenas unaus tunnies townies tineas tennis monies pians penis ninnies manas nannies johnnies snaws pennis minas ruanas hinnies monas jennies munis conies mynas bunnies nisi pennies minnies nays mynahs meanies faenas hyponoias anise faunas lanais bennies bunas quinoas genoas fannies gnaws scenas saunas kinase tawnies cannas funnies anas naos genius veenas sunnahs heinies anoas lunies kinas guanays lionise annas pinnies duennas nanas rennase sunnas genies beanies anis donas danios goonies sanies guanase tenuis siennas toonies zanies tunas unais guineas weenies whinnies punas chinas sheenies tennies hyaenas yonis