coulter or (esp N American) colter /kōlˈtər or (Scot) kooˈtər/

The iron cutter in front of a ploughshare

• topping
• topping lift
• topping lifts
• toppingly
• topping-out
• toppings
• topping-up
• topple
• toppled
• topples
• toppling
• top-proud
• toppy
• top quark
• top quarks
• tops
• topsail
• topsails
• top-sawyer
• top-sawyers
• top secret
• top-shelf
• top-shell
• topside
• topsides