disciplinarian
dis·cip·li·narian
noun
1.
someone who demands exact conformity to rules and forms
Origin
From discipline + -arian or disciplinary + -an.
Related words
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.