who·dun·it or who·dun·nit 
(h-dŭnĭt)
(h-dŭnĭt)n.
Informal
Informal
A story dealing with a crime and its solution; a detective story.
[Alteration of who done it?]
- unnamable
- unnameable
- unnatural
- unnaturally
- unnaturalness
- unnecessarily
- unnecessary
- unnerve
- unnervingly
- unnoticeable
- unnoticeably
- unnumbered
- unobjectionable
- unobstructed
- unobtrusive
- unobtrusively
- unobtrusiveness
- unoccupied
- unofficial
- unofficially
- unopposed
- unorganized
- unoriginal
- unornamented
- unorthodox