Select the INCORRECTLY spelt word.

The correct answer is cabagge.

Let us analyze each option to determine its spelling correctness:

1. receipt: This is spelt correctly. It refers to a written acknowledgment that a specified article or sum of money has been received.
2. privilege: This is spelt correctly. It refers to a special right, advantage, or immunity granted or available only to a particular person or group.
3. awkward: This is spelt correctly. It means causing or feeling uneasy embarrassment or inconvenience.
4. cabagge: This is spelt incorrectly. The correct spelling is cabbage, which has a double 'b' and a single 'g' (c-a-b-b-a-g-e). It refers to a cultivated plant eaten as a vegetable.