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.
sensa sense scenas scenes seines sennas sensei sins suns sans siennas sons sinus sines zeins sinhs sonsy sains cense sunns snows snaws sones scions xenias seance sunnas sinews snazzy hysons sonsie science senecio sinuous sonnies sunnahs zins
mensa sensa ens teens venus faenas kens miens lenes bonsai ansa genes lense mense ansae bens keens jeans aeons genus benes hymens lenos zeins weens yeans hyaenas tens chainsaw whenas paeons wens unsay hansa pens wrens neons scenas penes peens denes reins dense kenos lenis sheens hens hygienes teensy fens queans wheens queens weans veins deans foehns veenas beans sense paeans means dens gens gainsay nenes peans scenes cense rouens peons penis peins eons hyphens menus hyenas mensae leans liens lens dienes tense weensy whens yens
sen scena scene seen seine sene senna sewn sienna season seisin session