allegation vs allegement

allegation and allegement both are nouns.

Word	Noun	Adjective	Verb	Adverb
allegation	Yes	No	No	No
allegement	Yes	No	No	No

As nouns, allegation and allegement are synonyms defined as:

allegation and allegement: statements affirming or denying certain matters of fact that you are prepared to prove

allegation (noun)	allegement (noun)
(law) a formal accusation against somebody (often in a court of law)	statements affirming or denying certain matters of fact that you are prepared to prove
statements affirming or denying certain matters of fact that you are prepared to prove