Pocket Thesaurus
Antonyms of rule
statute, decree, precedent, guideline, regulation, ruling, test, law, order, etiquette, dictum, truism, canon, keynote, tenet, precept, keystone, moral, basis, ordinance, decorum, commandment, criterion, formula, axiom, edict, direction, aphorism, maxim, regimen, prescription, gnome, apothegm, assize, propriety, command, fundamental, model, guide, chapter and verse, decretion, the book, the numbers, no-no's
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