rud·der·stock 
(rŭdər-stŏk′)
(rŭdər-stŏk′)n.
The vertical shaft of a rudder that allows it to pivot when the tiller or steering gear is operated. Also called rudderpost.
- unmyelinated
- unnamable
- unnameable
- unnatural
- unnaturally
- unnaturalness
- unnecessarily
- unnecessary
- unnerve
- unnervingly
- unnoticeable
- unnoticeably
- unnumbered
- unobjectionable
- unobstructed
- unobtrusive
- unobtrusively
- unobtrusiveness
- unoccupied
- unofficial
- unofficially
- unopposed
- unorganized
- unoriginal
- unornamented