Word-formation

Thomas Edison's (invent) of the light bulb changed the world.

Winning a gold medal in the Olympics is a great (achieve) for any athlete.

(Popular) doesn't always equate to happiness.

The (observe) is watching the birds with binoculars from the park bench.

The (science) have spent years conducting their experiments.

After drinking too much coffee, Peter had a (sleep) night.

The (peace) sound of the waves helped me relax on the beach.

The (adventure) traveller hiked through the jungles.

Bullies like to (threat) others to exert power and control.

Using a calculator can (simple) complex math problems.