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.
rumbas rums rummies rams rems roms rims rooms rimes reams ramus roams rimous romeos ramies rhymes rimose remise remiss ramees ramose ramous roomies
limbas sambas rumbas gambas mambas mas bombes embays bimahs nemas mass amass gambias iambs gamays bimbos coombs mammas goombahs bombs maes nomas biomass lambs bemas hyphemias kombus gammas lemmas shamas wombs tombs dumbos doumas zombis summas simas camas bams pimas bimas moas pneumas combos commas gumbos maws limbs limbos lumas caeomas jumbos goombays lamias masa gambes amahs numbs lamas amas ambos mommas gombos mamas combes amias nimbus jambes limbus gummas llamas coombes iambus camass gamas pumas loumas mambos limas cumbias jambs comas omasa combs mays cymas gambs sambos somas zamias zymase dumas dumbs umbos chimbs shammas
rumba rum rummy arum brumby brume crumb crumby crummie crummy grum grume drum trumeau