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.
saunas sunnas suns sans sunnahs sanes snaws sains sunns scenas sansei sanies sennas sanious siennas sawneys sons sins sines zanza sones sinhs sinus sonsy sense snows xenias sonsie scions snazzy sensei sinews seines seance scenes hysons sinuous sonnies zinnias
faunas lunas saunas tunas punas bunas uns nonas kanas ruanas quinoas vinas mynahs hyponeas anoas funs annas anas veenas bunns pinnas snaws guanays pinas sunnahs faenas runes nans taenias hyenas shuns whenas zinnias unaus tuns guanase tenias dunes siennas donnas xenias sunnas suns fauns goannas sennas sunns rouens kinase gnaws ruins nanas kinas mannas quins munis guns guineas hennas runs lianas duennas muns lanais puns monas cannas buns unais manas lauans tunes nuns lunes naos rennase mynas nouns minas scenas genoas huns donas guans muons duns tauons manias tineas nays chinas hyaenas yuans
sauna sun sain sane sawn sawney sunn sunna sunnah sunny asana