What are gas words?

Weather,

Air gun,

Beaded with jewels,

24 solar terms,

Natural gas,

Hernia,

Bronchitis,

Ambition,

Berberi,

Qigong,

Courage,

Bureaucracy,

Temperature,

Solar terms,

Pneumothorax,

Emphysema,

Balloons,

Tracheitis,

Air pollution,

Heating,

Temperament,

Qi deficiency,

Domineering,

Oxygen,

Meteorology,

Air pollution,

Nitrogen,

Burp,

Air,

Purple gas comes from the east,

Gas,

Electrical,

Violence,

Gas range,

Hydrogen,

Liquefied gas,

In cahoots,

Chlorine gas,

atmosphere