A Millennium is a period of a thousand years. A Decade is ten years. A Century is one hundred years. A Centenary is a 100-year anniversary.

Geology is the science that deals with the earth's physical structure and substance, its history, and the processes which act on it. Ecology is the study of organisms and their environment. Orology is the study of mountains. Dermatology is the study of skin.

An Accomplice is a person who helps another commit a crime. A Scapegoat is blamed for others' wrongdoings. A Patriot loves their country. A Traitor betrays their country.

A Decade is a period of ten years. A Millennium is a period of one thousand years. A Centenary is a 100-year anniversary. A Century is 100 years.

A Kleptomaniac is a person with kleptomania, an irresistible impulse to steal. A Spendthrift wastes money. Gullible means easily deceived. A Traitor betrays their country.

Vexillology is the study of the history, symbolism, and usage of flags. Numismatics is the study of coins. Psephology is the study of elections. Orology is the study of mountains.

A Philanthropist is a person who seeks to promote the welfare of others, especially by the generous donation of money to good causes. A Philistine is indifferent to art. A Spendthrift wastes money. A Misanthrope hates humankind.

A Maxim is a short, pithy statement expressing a general truth or rule of conduct. A Synopsis is a short summary. Fraud is deceiving someone for money. Logic is the science of reasoning.

Mariticide is the killing of one's spouse. Matricide is killing one's mother. Sororicide is killing one's sister. Filicide is killing one's child.

Versatile means able to adapt or be adapted to many different functions or activities. An Autodidact is self-taught. A Linguist studies languages. Eloquent means good at persuading.