-n't shortened (enclitic) form of not¹

NT

1. National Theatre (now known as RNT)
2. National Trust
3. New Testament
4. Northern Territory (Aust)
5. Northwest Territories (of Canada)
6. No trumps (cards)

• fellow townsman
• fellow townsmen
• fellow traveller
• fellow travellers
• fell-runner
• fell-runners
• fell-running
• fells
• fell-walker
• fell-walkers
• fell-walking
• felly
• felo de se
• felon
• felonies
• felonious
• feloniously
• feloniousness
• feloniousnesses
• felonous
• felonries
• felonry
• felons
• felony
• felsic