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.
mambas mamas mambos mammas mamboes maims mameys mamies mammies mammees mammeys moms mems mums memes memos mimes momes momus mumms mumus mimeos mommas mommies mummies muumuus
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
mamba mambo maim mama mamey mamie mamma mammae mammee mammey mammie mammy imam cambium umami