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.
manus mans manes mains manas minus manos moans means manse menus mannas manias meanies muns mannose mons meanness mines hymns moons mense miens muons minas monas monos munis minis mynas hymens moneys monies mynahs meinies menisci minnies minnows
manus anus nus guans koans ansa beans kanas venous lanes banes kanzu beanos hansa fauns genus chains tains awns tenuis ruinous canes sinus pawns bans rains nonuse heinous pains lawns yeans wans tonus tansy dawns sanes roans pianos pans onus nanas menus canso gains ennuis moans fanos vanes venus bonus lianas llanos mains manes mans jeans wains cains genius gnus fans lianes fawns fanes loans vans manos means vinous cans anes manas kains venues leans anis ains anas queans nous manse nans minus janes banns conus aeneus pansy panes hanse peans lauans ranis nuns kanes guanos paeans naans sans kaons deans pians tans tenues ruanas tonneaus unaus sains wanes weans dans yawns yuans
man main mana mane mania manna mano many maun mawn mean meanie meany menu moan