Term: linchpin: pin inserted through an axletree to hold a wheel on
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: folie a deux: the simultaneous occurrence of symptoms of a mental disorder (as delusions) in two persons who are closely related (as siblings or man and wife)
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: windsor knot: a wide triangular slipknot for tying a tie
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: national flag: an emblem flown as a symbol of nationality
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: spray paint: paint applied with a spray gun
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: defense advanced research projects agency: the central research and development organization for the United States Department of Defense; responsible for developing new surveillance technologies since 9/11
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: heart-lung machine: a pump to maintain circulation during heart surgery; diverts blood from the heart and oxygenates it and then pumps it through the body
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: marquess: a British peer ranking below a duke and above an earl
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: astrology: a pseudoscience claiming divination by the positions of the planets and sun and moon
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: apostle: any important early teacher of Christianity or a Christian missionary to a people
Broader: pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | Unrelated: diptych: a painting or carving (especially an altarpiece) on two panels (usually hinged like a book)