Confusing words 
                                    Safety - security
    safety
  1. the condition of not being in danger or of not being dangerous 
  2. the state of being protected from danger or harm 
  1. For your safety, keep your seatbelt securely fastened.
  2. Fire officials worry about the safety of those heaters.
  3. public/passenger/consumer safety 
  4. the safety of sth 
  5. food/drug/product safety
  6. fire safety
  7. safety standards
     security
  1. protection of a person, building, organization, or country against threats such as crime or attacks by foreign countries 
  2. the group of people responsible for protecting a building 
  3. property or goods that you promise to give to someone if you cannot pay what you owe them
  1. The tighter security measures/precautions include video cameras throughout the downtown area.
  2. You'll need to notify security if you want to work late in the office.  
  3. She used her shares in the company as security against a $23 million bank loan