Backbreaking and Onerous

Backbreaking adjective - Requiring considerable physical or mental effort.

Onerous is a synonym for backbreaking in heavy topic. In some cases you can use "Onerous" instead an adjective "Backbreaking".

Onerous adjective - Difficult to endure.

Backbreaking is a synonym for onerous in difficult topic. You can use "Backbreaking" instead an adjective "Onerous", if it concerns topics such as heavy, trying.

Nearby Word: onerously