science fiction 
(abbreviation SF)
noun [mass noun]
Fiction based on imagined future scientific or technological advances and major social or environmental changes, frequently portraying space or time travel and life on other planets.He has composed for a variety of genres but science fiction, horror and fantasy stories dominate his filmography....
- The motif of alien beings peopling our planet is a very common one in science fiction.
- This very modern thriller has all the elements of science fiction combined with a racy thriller.
- nothing much
- nothingness
- nothing of the kind
- nothing of the sort
- nothing (or nothing else) for it
- nothing succeeds like success
- nothing ventured, nothing gained
- nothingy
- Nothofagus
- nothomorph
- no-thoroughfare
- nothosaur
- no-thought
- no through road
- no-throw
- not-I
- notice
- noticeability
- noticeable
- noticeably
- noticeboard
- notice paper
- noticer
- notifiable
- notification