boarding vs embarkment

boarding and embarkment both are nouns.

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

As nouns, boarding and embarkment are synonyms defined as:

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

Other synonyms of boarding include embarkation.

boarding (noun)	embarkment (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