Overhead and Operating budget

Overhead noun - (nautical) the top surface of an enclosed space on a ship.

Operating budget and overhead are semantically related In some cases you can use "Operating budget" instead a noun "Overhead".

Operating budget noun - A budget for current expenses as distinct from financial transactions or permanent improvements.

Overhead and operating budget are semantically related in money needed to run a business topic. You can use "Overhead" instead a noun phrase "Operating budget".