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.
manual manually manly hymnal mainly manila meanly menial hymenal manilla manille hymeneal hymenial menially hymeneally moonily
biannual annual manual zonule denial snail zonal pinnule renail penial pinnal annul nounal biennale canal vineal final tonal faunal finial banal venule venal canula binal lienal lunula hymenal hymenial veinal annuli tineal anal venial lineal genial annal anneal hymnal veinule vinal biennial phonal null nala nail finale lunule cannula cuneal hymeneal menial penal pineal pinnula ranula renal xenial zonula zoonal tenail toenail unnail
man main mana mane mania manna mano many maun mawn mean meanie meany menu moan