embark

As a verb embark

is to get on a boat or ship or (outside the USA) an aeroplane.

As an adjective onboard is

carried or used on or in a vehicle or vessel.

As an adverb onboard is

on or in a vehicle or vessel; aboard; on board.

In transitive terms the difference between commence and embark

is that commence is to begin to be, or to act as while embark is to engage, enlist, or invest (as persons, money, etc.) in any affair.

As verbs the difference between commence and embark

is that commence is to begin, start while embark is to get on a boat or ship or (outside the USA) an aeroplane.

In transitive terms the difference between bark and embark

is that bark is to speak sharply while embark is to engage, enlist, or invest (as persons, money, etc.) in any affair.

As verbs the difference between bark and embark

is that bark is to make a short, loud, explosive noise with the vocal organs (said of animals, especially dogs) while embark is to get on a boat or ship or (outside the USA) an aeroplane.

As a noun bark

is the short, loud, explosive sound uttered by a dog.

As verbs the difference between embark and reland

is that embark is to get on a boat or ship or (outside the usa) an aeroplane while reland is to land again.

As a verb embark

is to get on a boat or ship or (outside the usa) an aeroplane.

As a noun embarkee is

one who embarks on a vessel such as a ship or plane.