On-Board-Onboard | Commonly Confused Words

On board

/ɑn bɔrd /

To be present or involved in a project or activity, especially as a team member.

/ˈɑːnˌbɔːrd/

To help someone get started or become familiar with a new job, process, or system

"On board" is typically used as a prepositional phrase meaning physically on or in a vehicle or vessel.
"Onboard" is often used as an adjective to describe equipment that is located on a ship, aircraft, or vehicle.
"On board" often refers to people or things currently within or on a vessel, aircraft, or train.
"Onboard" as a verb means to orient or familiarize new employees with their job and work environment.
Remember that on board often has to deal with physical placement, while onboard can relate to functions or roles.