The definition of a linchpin is a pin that holds the wheel onto the end of an axle, or something that holds things together.
(Architecture) Carved work, somewhat resembling an anchor or arrowhead; part of the ornaments of certain mouldings. It is seen in the echinus, or egg-and-anchor (called also egg-and-dart, egg-and-tongue) ornament.
The definition of a mainstay is something that is depended on, or something that is necessary.
The central supporting element of a whole.
(Chemistry) The main chain of atoms in a polymer.
Find another word for lynchpin. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for lynchpin, like: linchpin, anchor, mainstay, keystone, backbone and lynch-pin.