spindle vs trunnion

spindle

noun
  • A rotary axis of a machine tool or power tool. 

  • A solid generated by the revolution of a curved line about its base or double ordinate or chord. 

  • Any marine gastropod with a spindle-shaped shell formerly in one of the three invalid genera called Fusus. 

  • The fusee of a watch. 

  • A long and slender stalk resembling a spindle. 

  • Any marine univalve shell of the genus Tibia; a spindle stromb. 

  • Certain of the species of the genus Euonymus, originally used for making the spindles used for spinning wool. 

  • A rod used for spinning and then winding natural fibres (especially wool), usually consisting of a shaft and a circular whorl positioned at either the upper or lower end of the shaft when suspended vertically from the forming thread. 

  • A yarn measure containing, in cotton yarn, 15,120 yards; in linen yarn, 14,400 yards. 

  • A sleep spindle. 

  • A rod which turns, or on which something turns. 

  • An upright spike for holding paper documents by skewering. 

  • A cytoskeletal structure formed during mitosis 

  • a dragonfly, calque of Swedish slända (dragonfly/spindle), introduced by New Sweden settlers. 

  • A muscle spindle. 

  • A plastic container for packaging optical discs. Bulk blank CDs, DVDs, and BDs are often sold in such a package. 

verb
  • To make into a long tapered shape. 

  • To impale on a device for holding paper documents. 

  • To take on a long tapered shape. 

trunnion

noun
  • A shaft, held by a bearing, at each end or side of a rotatable object. 

  • A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool. 

  • A similar rotational bearing used in automotive suspensions. 

  • One of the short stubby bearings on either side of a cannon; a gudgeon. 

How often have the words spindle and trunnion occurred in a corpus of books? (source: Google Ngram Viewer )