DEN - The home of certain animals.
END - The final point of something in space or time.
NET - A mesh of string, cord or rope.
TEN - A numerical value equal to 10; the number occurring after nine and before eleven, represented in Roman numerals as X, in Arabic numerals as 10, and in the hexadecimal system (base 16) as A.
DENT - A shallow deformation in the surface of an object, produced by an impact.
NEED - A requirement for something.
TEEN - A teenager, a person between 13 and 19 years old.
TEND - To kindle; ignite; set on fire; light; inflame; burn.
TENT - A pavilion or portable lodge consisting of skins, canvas, or some strong cloth, stretched and sustained by poles, used for sheltering persons from the weather.
TENET - An opinion, belief, or principle held to be true by someone or especially an organization.
NETTED - Simple past tense and past participle of net.
DETENTE - A relaxing of tension between major powers, especially the particular thawing of relations between the Soviet Union and the United States following the Cold War.