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.
seitan seton stain stane stein sedan cetane sitten soutane stun satin steno stony sadden sateen satiny sodden soudan sudden zeatin
seitan titan sheitan witan shaitan tan litany chitin rattan piton whiten dittany median tetany detain stain cotan ratany radian ratan niton butane botany attain reattain cetane gitano retain tain soutane chiton stane phytane
sit set seat seta setae sett settee site suet suety suit suite seised seized