Read the passage below and then write the synonym or antonym  of the words as directed:

Smoking is a very bad habit. It is a dangerous habit too. It is so dangerous and mortifying that it may cause cancer, heart attack, high blood pressure, chronic troubles and other serious diseases. Smoking tobacco products is a major health hazard. One puff of cigarette smoke contains fifteen billion particles of extremely poisonous things such as nicotine, methyl alcohol, carbon monoxide, formaldehyde, arsenic and several other acids. These are all really very fatal and injurious to health. Nicotine constricts the size of blood vessels which impedes the normal flow of blood and oxygen in the body. It causes the heart to beat faster. Arsenic and tobacco tar are cancer causing agents in animals and human beings. Tobacco tar forms a brown sticky mass inside the lungs and it hinders the easy flow of blood. In short, the dangers of smoking are quite unlimited and all should avoid it to live a happy and peaceful life.