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.
rums rumbas rams rims rems roms rummies rimes reams ramus roams rooms ramees romeos rimose ramose remiss ramous remise rimous rhymes ramies roomies
bums hums geums gaums gums lums mums neums rums sums doums chums