Being thus labeled is somewhat akin to being called a child molester in that the tag never seems to go away, and both can be equally deleterious to one's career.
One concept labeled as hysterical neurosis (also known as conversion disorder) and the other concept labeled as hysterical character (currently known as histrionic personality disorder).
For example, the differences between the reactant and the transition state zero-point energies may be identical between the normal reactant and its isotopically labeled version.