Webster's 1828 Dictionary
STRICTNESS
n. 1. Closeness; tightness; opposed to laxity.
2. Exactness in the observance of rules, laws, rites and the like; rigorous accuracy; nice regularity or precision.
I could not grant too much or distrust too little to men that pretended singular piety and religious strictness.
3. Rigor; severity.
These commissioners proceeded with such strictness and severity as did much obscure the kings mercy.
Webster's 1913 Dictionary
STRICTNESS
STRICTNESS Strict "ness, n.
Defn: Quality or state of being strict.
New American Oxford Dictionary
strictness
strict ness |ˈstriktnis | ▶noun the quality or condition of being strict: the strictness of his upbringing.
Oxford Dictionary
strictness
strict |ness |ˈstrɪk (t )nəs | ▶noun [ mass noun ] the quality or condition of being strict: the strictness of his upbringing.
American Oxford Thesaurus
strictness
strictness noun 1 the strictness of the laws: severity, harshness, rigidity, rigidness, stringency, rigorousness, sternness. ANTONYMS flexibility. 2 the provision has been interpreted with strictness: precision, preciseness, accuracy, exactness, faithfulness; meticulousness, scrupulousness. ANTONYMS imprecision.
Oxford Thesaurus
strictness
strictness noun 1 the strictness of the gun control laws: severity, harshness, rigidity, rigidness, stringency, rigorousness, austerity; authoritarianism, sternness. ANTONYMS flexibility. 2 the provision has been interpreted with some strictness: precision, preciseness, accuracy, exactness, exactitude, correctness, faithfulness, closeness, correspondence; meticulousness, scrupulousness, thoroughness. ANTONYMS imprecision.
The Wordsmith Dictionary