-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)

• carrom balls
• carronade
• carronades
• carron oil
• carrot
• carrot and stick
• carrot flies
• carrot fly
• carrotier
• carrotiest
• carrots
• carroty
• carrousel
• carrousels
• carrs
• carry
• carry-all
• carryall
• carry all before one
• carry-alls
• carryalls
• carry a torch
• carry a torch for
• carry away
• carry away the bell