'twere a contraction of it were

• tricycle landing gear
• tricycler
• tricyclers
• tricycles
• tricycle undercarriage
• tricyclic
• tricycling
• tricyclings
• tricyclist
• tricyclists
• tridacna
• tridacnas
• tridactyl
• tridactylous
• tridarn
• tridarns
• tride
• trident
• tridental
• tridentate
• tridented
• Tridentine
• tridents
• tridimensional
• tridominium