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.
steady stead staid steed study sated sited stade stied seated sauted suited sooted sotted stadia sauteed satiety stud stat stet cited sided stoat stood state citied sedate seeded sodded statue studio sueded situate studdie
steady daddy dead deedy teddy toady butthead hodaddy stead
satay sate seat seta setae site staw stay stew stewy stey stoa stoae stoai seaside teased