A mark's puzzle

[Lina Benb]

Good morning everyone .
I'm joining a group in ******** , It has a good teacher : MARK
He has put some puzzles , and I like to share it with you guys :
Loss of memory. A7
Solo speech. S9
Wish. D6
Cross question I.11
On time- P8
Detective S6
Found in coffee- C8
Diversity in nature- B12
Arid sandy land- D6
Living environment-H7
Share secret- D7
Science/Study of ********- L11
Comparison by contrast- J13
Storm-T7.
Both on land and in the water A10
Using both hands with equal ability A12
A huge fire I 7
A kind of green. L7
Not drunk S5
Belief that gives hope F5.

P.S : You need to get the synonym of each word , like the first one : get its synonym as long as it starts with M and has 9 letters in it .
Good luck .
Sincerely , Line .