Happiness - a state of well-being and contentment. Example: She felt a surge of happiness when she saw her family waiting for her at the airport.

Lightning - a sudden and powerful electrical discharge in the atmosphere. Example: The storm was so intense that the lightning lit up the entire sky.

Stress - a state of mental or emotional strain caused by adverse circumstances. Example: The pressure of the upcoming exam was causing her a lot of stress.

Fuel - a material that is burned to produce energy. Example: The car needs fuel to run, so we stopped at the gas station to fill up the tank.

Cold - a low temperature, especially in the atmosphere. Example: She shivered in the cold wind as she walked home from work.