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.
since science sines sinews seines seance sins cines zincy sense sones sinhs sinus zines sains sanes scenas snooze sanies sneezy scions scenes sneeze sonsie sawneys siennas sinuous sonnies sans sons suns zins
quince since yince wince mince wincey whines niece nonce dunce nice fiancee nines nuance jaunce jounce tines chance kines zincy vines hence ounce pines ponce rance cines seance mines lance shines winze koines pinnace seines wines lines pence fiance hance nance bines fines launce menace fence chines bounce chaines once mincy pounce rinse science sines zines dines tenace whence faience dance
sin sain seine sienna sign sine sinew sinewy sinh