embarkation vs going

embarkation and going both are nouns.

Word	Noun	Adjective	Verb	Adverb
embarkation	Yes	No	No	No
going	Yes	Yes	No	No

As nouns, going is a hypernym of embarkation; that is, going is a word with a broader meaning than embarkation:

embarkation: the act of passengers and crew getting aboard a ship or aircraft
going: the act of departing

Other hypernyms of embarkation include departure, going away, leaving.

embarkation (noun)	going (noun)
the act of passengers and crew getting aboard a ship or aircraft	advancing toward a goal
	the act of departing
	euphemistic expressions for death

embarkation (adjective)	going (adjective)
	in full operation