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.
sinus sins sinuous sines sinhs sains sinews seines scions sans suns zins siennas sons sanious sensa sunns zeins sanes sones sense snows cines snaws sonsy zines since scenes scenas sennas saunas sanies hysons sunnas sawneys science sonnies sunnahs zinnias
minus sinus ins nus inns cines rains hins fins loins ruinous miens jinns joins gains sains nonuse pinas onus quinsy linns finis manus liens finos aeneus lins ions sines kinas kinos sins unaus shins pins chins chines tains chains wins zins wines whines zeins tins heinous vinos tenuis genus dinos veins venues koines fines rins scions mines peins coins menus vinas ennuis bonus foins rinse genius gins nuns mains quoins kines linos lines sinhs kins nous bines pions vinous bins cains vines conus minis venus venous anus jins ruins pians ains pines quins reins seines kains nines lions cions dines minas tenues pains tonus tines gnus wains whins zines winos chaines dins chinas chinos sanious shines yins
sin sain seine sienna sign sine sinew sinewy sinh