The state of being exact.

plural of exactness

Precisely agreeing with a standard, a fact, or the truth; perfectly conforming; neither exceeding nor falling short in any respect.

(transitive, intransitive) To demand and enforce the payment or performance of, sometimes in a forcible or imperious way. / (transitive) To make desirable or necessary.

exactly

Having the capability of being exacted.

Alternative spelling of exactor

Making great demands; difficult to satisfy. / (of an action, task, etc) Requiring precise accuracy, great care, effort, or attention. / (of a person or organization) Characterized by exaction.

present participle and gerund of exact

The act of demanding with authority, and compelling to pay or yield; compulsion to give or furnish; a levying by force / extortion.