Here are the words with the underlined parts pronounced differently from the others:

1. **C. called** (the "al" sound is different)
2. **D. stopped** (the "op" sound is different)
3. **A. worried** (the "or" sound is different)
4. **B. smelled** (the "ell" sound is different)
5. **A. worked** (the "or" sound is different)
6. **C. attracted** (the "at" sound is different)

For each set, those words are pronounced differently compared to the others listed.