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.
mainsail moonsail mensal
mainsail moonsail nasal ensile mensal nonnasal pensil pensile censual sensual tensile tonsil unseal
mains mans manas manes manos manse manus means miens minas mines minis minus moans amins