The word "in-exactnesses" refers to the lack of precision or accuracy in something. Its antonyms would be terms that convey the idea of precision, exactitude, and correctness. Some antonyms for "in-exactnesses" include accuracy, precision, perfection, meticulousness, exactness, and correctness. These words describe a situation or object that has been carefully and accurately measured, calculated, or defined. Precision and accuracy are essential in fields like science, mathematics, and engineering, where even minute errors can lead to disastrous consequences. The antonyms of in-exactnesses are qualities that are highly valued in both personal and professional contexts and help to ensure that things are done correctly and accurately.