Head gate and Lock

Head gate noun - A gate upstream from a lock or canal that is used to control the flow of water at the upper end.

Lock and head gate are semantically related. In some cases you can use "Lock" instead a noun phrase "Head gate".

Lock noun - One that is certain to succeed.

Head gate and lock are semantically related. You can use "Head gate" instead a noun "Lock".

Nearby Words: locked, lockup, locker, locket, lockout