too, zoo, food, roof, cool, fool, school, stool, tool, broom, room, loon, moon, noon, soon, poor, goose, loose, boot, root, groove
good, hood, stood, wood, book, brook, coook, look, took, wool, foot
这里还有很多.你慢慢看吧.
http://wordnavigator.com/ends-with/oo/http://wordnavigator.com/starts-with/oo/