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.
maims mimes mamas mimeos mammas mamies mameys mimosa mambas mambos mammies mammeys moms mamboes mammees mems mums memes memos momes momus mumms mumus mommas mommies mummies muumuus
aims maims beams limbs bimas limos lamas amis kames lambs gams whams loams cams amus fames lams bams dams teams cames names shims pams shamus shamos rims shamas chimbs whimsy tamis reams rams wames seams mamas sims dims gambs jams gaums iambs limes haems hames vims hams amas whims hims camos camas gamas games lames llamas foams limas dimes jambs times tams tames dames mimes simas wamus ramus rimes chams nims chimes shames roams shams shawms pimas yams
maim mim imam mimeo mime mammy mammie mammey mammae mammee mamma mamie mamey mambo mamba mama umami