Well, sense in the categories there is "Word Play Puns and Oxymorons", I would think that the answer was "safety".
I think the answer is safety for two reasons:
1. The word "safety starts with the letter 'S'.
2. It literally and mentally ends in 'Y', or, 'You'.
source
Spear is a synonym for lance. It begins with the letter S.
Saxony is a woolen fabric. It begins with the letter s.
The sun makes you warm. It begins with the letter s.
Souda Bay is a port in Greece. It begins with the letter S.
Suffrage is the right to vote. It begins with the letter s.
Sapphire is the birthstone for September. It begins with the letter s.
Swiss cheese is hard. It begins with the letter s.
Showers describe precipitation. It begins with the letter s.
Sumatra is a large island in Indonesia. It begins with the letter S.
Substantial is a synonym for large amount. It begins with S.
The soleus muscle is in the calf part of the lower leg. It begins with the letter s.