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.
snaws snows sinews sunnas scenas saunas sennas sunnahs sins suns siennas sawneys sons sans sinhs sanes sunns sines sains sensa sinus sense sones sonsy sensei snazzy scions seines sansei sanies scenes sonsie hysons sanious sinuous sonnies
gnaws snaws vinas anas nows guanays annas bunas hyponeas news sunnas lanais donas pinas mynahs lianas kinase nonas nanas mannas minnows snows tenias hyenas chinas goannas winnows unaus saunas tunas punas sinews duennas naos rennase zinnias nays genoas sennas manas faenas kanas monas pawns guineas nonnews mynas kinas cannas donnas nans xenias manias minas lunas hennas awns pinnas guanase anoas lawns quinoas sunnahs knows enows renews siennas dawns faunas scenas taenias fawns tineas unais veenas whenas chainsaw ruanas hyaenas yawns