* "Ough" can have several different vowel sounds depending on the word:
* "ow" as in "though"
* "oh" as in "dough"
* "uh" as in "rough"
* "oo" as in "through"
* "u" as in "enough"
* "Grouch" has the vowel sound of "ou" as in "out".
So, while they both involve the letters "o" and "u", they have distinct vowel sounds.