Sounds like "ow" (as in "cow"):
* ough - though, dough, although, through,
* ow - now, how, cow,
* ou - out, about, clout,
* o - go, know, so,
* oe - toe,
* eau - beau,
Sounds like "uff" (as in "stuff"):
* ough - rough, tough, enough,
* uff - stuff, puff,
* off - off,
* ove - love, dove,
* ev - have,
Sounds like "oh" (as in "go"):
* ough - bough,
* o - go,
* oe - foe,
Sounds like "oo" (as in "moon"):
* ough - through (sometimes, depending on accent)
* oo - moon,
Note: There are many variations in pronunciation, especially across different accents. Some words might sound like "ough" but not be listed here!
Let me know if you want more examples, or if you're interested in words that sound like specific "ough" sounds!