(n.) The quality or state of being rigid.

absoluteness attention to detail attention to fact care for truth circumstantiality conscientiousness correctness criticality criticalness definiteness delicacy detail exactingness exactitude exactness exquisiteness faithfulness faultlessness fidelity fineness finicality finicalness finickiness finickingness flawlessness fussiness literalism literality literalness mathematical precision meticulousness minuteness minuteness of detail niceness nicety particularity particularness perfection preciseness precisianism precision punctiliousness punctuality refinement right rightness rigidity rigidness rigor rigorousness scrupulosity scrupulousness severity specificity strictness subtlety textualism the letter