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.
mentally mental mantilla mantel mantle mandala monadal mannitol minutely
genitally quantally mentally neonatally dentally nodally anodally
menta maenad manta meant menad mentee ament omenta