lex•i•con (lex-e-kon):

1. A dictionary.
2. A stock of terms used in a particular profession, subject, or style; a vocabulary.
3. Linguistics. The morphemes of a language considered as a group.

archaeology	the scientific study of people and things from the past
artifact	an object made, used or modified by a human being
assimilate	to take up and absorb a cultural tradition
ceding	to yield or give up, especially by treaty
characteristic	individual, specific, or particular feature
city planner	a person employed by an elected city council to plan and manage the growth and development of the city, including transportation, housing, water supply, sewage disposal, recreation areas, airports, automobile parking, and zoning laws.
civic leaders	leaders of a city
civil rights	rights of a citizen which are guaranteed by the 13th and 14th amendments to the Constitution and by acts of Congress
company town	a town built especially by a business to provide homes, goods and services for its workers
Depression	The Great Depression, or the collapse of the world economy, began with the Wall Street Stock Market Crash on October 29, 1929 and lasted for ten years. It was caused by U.S. factories producing more goods than people could buy, unstable economic conditions in Europe, the agricultural decline since 1919, corporate mismanagement, excessive speculation, and high unemployment.
diversity	the condition of being different or having differences
Downtown	the business center of a city
Emergency Relief Act	President Franklin D. Roosevelt, during the Depression in 1933, asked Congress to authorize $500 million to give direct grants to cities and states.
escalate	to increase in extent, volume, number, intensity, or scope
ethnic	of or relating to races or large groups of people classified according to common traits and customs who may keep their language or social views
genealogy	the study of family pedigrees or lines
Ghost town	an abandoned town or village that is at least still standing
goods and services	goods are things made to be sold and services are what people do that other people need or want
heritage	something that has come from an ancestor or the past; a right, privilege, or possession
hypothesis	an assumption made especially in order to test its logical or empirical consequences; an educated guess
interact	shared or reciprocal action or influence
interconnected	joined or attached to each other
Korean Conflict	Cold War conflict begun on June 25, 1950 - July, 1953; Korea was a divided country at the 38th parallel between the North Korean forces (Communist) aided by China and the Soviet Union and the South Korean forces (non-Communist) aided by the United States, Australia, Belgium, Luxembourg, Canada, Columbia, Ethiopia, France, Great Britain, Greece, the Netherlands, New Zealand, the Philippines, South Africa, Thailand, and Turkey, with medical help from Denmark, India, and Sweden.
mail fraud	using the postal system to deceive, cheat or trick people
market economy	trade or economic activity based on the production, distribution, and consumption of goods and services
marketplace	a place for business or trade within a town or community
mortgage	a transfer of rights to a piece of property usually as security for the payment of a loan or debt that becomes void when the debt is paid
neighborhood	people who live next to or near one another in a section of an area and usually have distinguishing characteristics
Persian Gulf War	A missile attack led by U. S. forces against Iraq on January 16, 1991 because Iraq failed to withdraw from Kuwait as had been ordered by the United Nations Security Council. A second missile attach was launched at intelligence sites on June 26, 1993. The Persian Gulf war actually began in September 22, 1980 with Iran against Iraq; however, fighting has been on going since the Arab-Israeli War in 1973. A cease-fire agreement held Iraq responsible for eliminating all poison gas and germ warfare weapons and allowing U.N. observers to inspect all weapons sites. U.N. trade sanctions were also imposed on Iraq.
piece work	work done and paid for by the piece
primary source	eyewitness account of an event that a person saw or participated in and recorded it in the form of a letter, diary, journal, photograph, newspaper article, oral history, document, or object
refugees	people who flee their country and go to another country for safety
Spanish American War	1898, fought in Cuba between the United States and Spain against the Spanish rule in Cuba after the U.S. ship, the Maine, was mysteriously sunk in Havana, Cuba's harbor.
squatters	people who claimed and settled a piece of public land before official surveys could be conducted and the land could be sold; once the land was available for sale, they could officially buy the land for a minimum price
steam engine	an engine that is worked or powered by steam
subsidies	a gift of public money in the form of support or assistance, a grant
subsistence farming	farming that provides the minimum amount of food needed for a farm family to exist, usually without any extra to be sold at market to make money.
technology	applied or useful science
unique	being the only one of its kind; very unusual
Vietnam War	after World War II, Vietnam divided into the North (under Ho Chi Mihn against French rule in Vietnam) and the South (under rule from France). Fighting against the two forces last until 1954, when the French lost. A treaty formally divided Vietnam into the North (Communist, aided by the Soviet Union) and the South (non-Communist, aided by the United States) U.S. troops were sent in 1964. War between the two forces continued until a cease-fire agreement was reached in 1973. France and the United States removed their troops, but fighting continued until the North took over the South in 1975 and the entire country became Communist.
Works Progress Administration (WPA)	During the Depression in 1935, President Franklin D. Roosevelt asked Congress to spend $5 billion to put the unemployed on the federal payroll so that they could earn enough to meet their basic needs and help stimulate the economy. It also tried to preserve the skills of American artists, actors, and writers. Though the WPA did help to ease the burden of the unemployed, it never employed at any one time more than three million of the ten million jobless. As a result, it failed to overcome the Depression.
World War I	world wide conflict begun in June 28, 1914 - November 11, 1918; between Great Britain, France, Russia, and their allies (Belgium, Serbia, Japan, Italy, and the United States) against Germany and Austria-Hungary and their allies (Turkey and Bulgaria)
World War II	world wide conflict begun in 1939 - 1945. Began with Germany attacking Poland, September 1, 1939. France and Great Britain declared war against Germany. Early German victories in Europe encouraged Italy to enter in June, 1940. However, due to the superiority of resources and industrial production (mainly the atom bomb) because of the entry of the Soviet Union and the United States (1941) on the side of France and Great Britain, the Allies (France, Great Britain, the Soviet Union, and the United States) were able to defeat Italy in September, 1943, Germany in May, 1945, and Japan in August, 1945.