Definition: playful or mischievous tricks, pranks or shenanigans.

My coworker's _____________________ include hiding staplers and filling cubicles with balloons.

Definition: not harmful.

Turtles almost never harm humans--as animals go, they are totally ____________________.

Synonyms harmless, innocuous

Antonyms deleterious, harmful, injurious

Definition: a rich harvest or a sudden good fortune.

This year's crop of tomatoes was a _______________ for the local farmers. They weren't expecting to make such a profit.

Synonyms gold mine, windfall

Definition: to quote something as an authority.

When writing a paper, be sure to ___________________ several different sources to support your argument.

Synonyms mention, refer to

Definition: a part or piece of a greater whole.

Roger broke his bike down so he could clean each individual ________________ before putting it back together.

Synonyms constituent, ingredient, element

Definition: a general idea or thought about something.

Mika's designs showed a _____________________ for a flying car.

Synonyms notion

Definition: to spoil the appearance of.

Someone had _________________ the book by ripping and drawing on its pages.

Synonyms disfigure, mar, vandalize

Antonyms beautify

Definition: a puzzling situation or person.

The way to solve a Rubik's Cube is an ______________________ to me. It just seems impossible.

Synonyms maze, mystery, paradox

Definition: going on forever; having no boundaries.

I couldn't see where the daisies stopped. There seemed to be an _____________________ amount.

Synonyms endless, immeasurable, unlimited

Antonyms finite, limited

Definition: very profitable.

Luckily, my stockbroker made a __________________ investment with my money, so I will be able to retire early.

Synonyms gainful, moneymaking, remunerative

Antonyms unprofitable

Definition: reasonable, sensible.

We must count on the judges to be ___________________ and guide us logically in the law.

Synonyms calm, level-headed

Antonyms irrational, illogical

Definition: calm and peaceful.

My grandparents liked the ______________ atmosphere of the resort, as opposed to the loud and noisy beach area.

Synonyms still, tranquil

Antonyms agitated, furious, upset

Definition: to yield, surrender or give in.

I refused to _________________ to the flu and went to the concert even though I had a fever.

Synonyms give way, surrender, yield

Antonyms conquer, resist, triumph

Definition: a movement from one form, state, style or place to another.

I love watching the leaves make the ______________ from green to red in the fall.

Synonyms passage