contestation
Concise Oxford English Dictionary © 2008 Oxford University Press:
contestation/kɒntɛˈsteɪʃ(ə)n/
▶noun formal the action or process of disputing or arguing.
– origin C16: from L. contestatio(n-), from contestari (see contest); reinforced by Fr. contestation.
'contestation' also found in these Oxford entries:

