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.
rattoons ratoons rattons rattans rattens ratteens radons ratans reattains rhytons ratines ratanies ruttiness rootiness redons rutins redans rottenness radians retains retenes retines retunes retinues routines readiness rowdiness
toons ratoons rattoons tons duotones setons jettons rhytons buttons phytons rattons pitons phaetons putons nitons muttons moutons cottons jetons photons codons newtons betons batons atones towns tonus tones futons ketones boutons mutons cytons stones chitons
ratton rattoon ratoon rattan ratteen ratten reattain craton