1. Collision or serious accident in which a train is badly damaged 
2. Anything that is a complete disaster

Encyclopedia: Train wreck

• tumbling
• tumbrel
• tumbril
• tumefaction
• tumefy
• tumesce
• tumescence
• tumescent
• tumid
• tumidity
• tumidness
• tummy
• tummy crunch
• tummy tuck
• tumor
• tumor necrosis factor
• tumor suppressor gene
• tumor virus
• tumorous
• tumour
• tumour necrosis factor
• tumour virus
• tump
• tump over
• Tums