bo·sun 
(bōsən)
(bōsən)n.
Variant of boatswain.
- unnameable
- unnatural
- unnaturally
- unnaturalness
- unnecessarily
- unnecessary
- unnerve
- unnervingly
- unnoticeable
- unnoticeably
- unnumbered
- unobjectionable
- unobstructed
- unobtrusive
- unobtrusively
- unobtrusiveness
- unoccupied
- unofficial
- unofficially
- unopposed
- unorganized
- unoriginal
- unornamented
- unorthodox
- unorthodoxly