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.
plumbs plums plumbous plumes plumbeous plumose palms palliums polemize
plumbs lambs nelumbos kalimbas glumes culms illumes clumsy limbos haulms limbs limbus loumas lumas relumes plumes solums palliums limbas alums volumes kaliums glums galliums coulombs heliums climbs vellums foliums alliums flumes flambes blumes plums lums slums oleums chillums
plum plumb plume plummy plumy palm palmy