disembarkment vs disembarkation

disembarkment and disembarkation both are nouns.

Word	Noun	Adjective	Verb	Adverb
disembarkment	Yes	No	No	No
disembarkation	Yes	No	No	No

As nouns, disembarkment and disembarkation are synonyms defined as:

disembarkment and disembarkation: the act of passengers and crew getting off of a ship or aircraft

Other synonyms of disembarkment include debarkation.

disembarkment (noun)	disembarkation (noun)
the act of passengers and crew getting off of a ship or aircraft	the act of passengers and crew getting off of a ship or aircraft