1. I couldn't sleep although I was very tired.

in spite of my tiredness, I couldn't sleep

2. She accepted the job although the salary was low

despite the low salary, she accepted the job

3. He runs fast although he is old

in spite of his old age, he runs fast

4. Although he's a millionaire , he lives in a very small flat

despite being a millionaire, he lives in a very small flat

5. Although they have a lot of money , they're still not happy

in spite of having a lot of money , they're still not happy

6. Although the traffic was heavy , we got there on time

despite the heavy traffic, we got there on time