boarding vs embarkation

boarding and embarkation both are nouns.

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

As nouns, boarding and embarkation are synonyms defined as:

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

Other synonyms of boarding include embarkment.

boarding (noun)	embarkation (noun)
the act of passengers and crew getting aboard a ship or aircraft	the act of passengers and crew getting aboard a ship or aircraft
a structure of boards