despoilation vs despoilment

despoilation and despoilment both are nouns.

Word	Noun	Adjective	Verb	Adverb
despoilation	Yes	No	No	No
despoilment	Yes	No	No	No

As nouns, despoilation and despoilment are synonyms defined as:

Other synonyms of despoilation include despoliation, spoil, spoilation, spoliation.

despoilation (noun)	despoilment (noun)
the act of stripping and taking by force	the act of stripping and taking by force