student asking question

Isn't "on board" more appropriate here? What is the difference between "onboard" and "on board"?

teacher

Native speaker’s answer

Rebecca

You're right, it is actually more correct to use "on board" as two words in this case. "On board" is generally used as two words unless it comes before a noun, in which case it is one word ("onboard"). Ex: This flight has lots of onboard food and beverages. Ex: There are not many passengers on board.

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