-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)

• tenorist
• tetchinesses
• tetchy
• teth
• tether
• tethered
• tethering
• tethers
• teths
• Tethys
• tetr-
• tetra
• tetra-
• TETRA
• tetrabasic
• tetrabasicities
• tetrabasicity
• Tetrabranchia
• Tetrabranchiata
• tetrabranchiate
• tetrabranchiates
• tetrachlorethane
• tetrachlorethylene
• tetrachloride
• tetrachlorides