Boarding, launching, entering, plunging into, setting out...
The likely word is embarking (leaving on a ship, or a journey).
Embarking. Getting off the ship is referred to as disembarking. :)
what is the nature of the trip upon which the 29 travelers are embarking
Recruits Embarking - 1904 was released on: USA: January 1904
Cuban Volunteers Embarking - 1898 was released on: USA: June 1898
Embarking
Typically, one would take a few steps before embarking on a journey.
Embarking Wood in the Far East - 1904 was released on: USA: October 1904
Roosevelt's Rough Riders Embarking for Santiago - 1898 was released on: USA: June 1898
Another word for wedding is Marriage. Another word is Matrimony
Another word is but
another word for cerfew