Here are the words with different stress patterns from the others:

1. **B. conclusion** - Stress is on the second syllable (con-CLU-sion), while the others have stress on the last syllable.
2. **A. possibility** - Stress is on the third syllable (pos-si-BIL-i-ty), while the others have stress on the second syllable.
3. **D. hospital** - Stress is on the first syllable (HOS-pital), while the others have stress on the second syllable.
4. **D. interest** - Stress is on the first syllable (IN-terest), while the others have stress on the second syllable.
5. **D. president** - Stress is on the first syllable (PRES-i-dent), while the others have stress on the second syllable.

So the answers are:
1. B
2. A
3. D
4. D
5. D