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.
slimsy slims slimes slams slums salmis solums salaams salamis celoms xylems
flimsy slimsy heliums kilims kaliums limbs limes limos alliums films foliums limas millimes claims climes clumsy galliums glimes glims kelims malmsey palliums slims climbs slimes delimes
slim slime slimy salmi slam slum slummy