Choose the word whose main stress pattern is not the same as that of the others

Here are the words from the exercise that do not follow the same main stress pattern as the others:

1. **1. A. maintenance** (stress on the second syllable) - others are first syllable stress, e.g., division, omission.
2. **3. B. attainable** (stress is on the second syllable) - the others are either first syllable stress or different placement.
3. **5. B. urgent** (single syllable) - the others have two or more syllables.
4. **7. B. constructive** (stress on the second syllable) - others are first syllable stress.
5. **9. C. impossibility** (stress on the third syllable) - most others are simpler stress patterns.

This pattern can be different for various words, and identifying the main stressed syllable correctly is key. If you have specific pairs or groups, I could analyze those directly!