polemic

Example:The controversy over the new medical treatment has sparked heated debates among experts.

Definition:a heated or bitter dispute or argument, especially one that continues over a long period.

Example:Their quarrel over who was responsible for the mess affected their friendship.

Definition:a usually heated exchange of words or a fight, especially when the participants do not intend to come to a resolution.

Example:The debate over the merits of capitalism versus socialism remains intense.

Definition:an exchange of arguments, typically between two people or groups, who disagree about something, usually over a long period of time.