Nouns

(n)rule, regulationa principle or condition that customarily governs behavior“it was his rule to take a walk before breakfast”, “short haircuts were the regulation”
(n)convention, normal, pattern, rule, formulasomething regarded as a normative example“the convention of not naming the main character”, “violence is the rule not the exception”, “his formula for impressing visitors”
(n)rule, prescriptprescribed guide for conduct or action
(n)rule, linguistic rule(linguistics) a rule describing (or prescribing) a linguistic practice
(n)principle, rulea basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct“their principles of composition characterized all their works”
(n)rulethe duration of a monarch's or government's power“during the rule of Elizabeth”
(n)dominion, ruledominance or power through legal authority“France held undisputed dominion over vast areas of Africa”, “the rule of Caesar”
(n)ruledirections that define the way a game or sport is to be conducted“he knew the rules of chess”
(n)ruleany one of a systematic body of regulations defining the way of life of members of a religious order“the rule of St. Dominic”
(n)principle, rulea rule or law concerning a natural phenomenon or the function of a complex system“the principle of the conservation of mass”, “the principle of jet propulsion”, “the right-hand rule for inductive fields”
(n)rule, formula(mathematics) a standard procedure for solving a class of mathematical problems“he determined the upper bound with Descartes' rule of signs”, “he gave us a general formula for attacking polynomials”
(n)rule, rulermeasuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths

Verbs

(v)govern, ruleexercise authority over; as of nations“Who is governing the country now?”
(v)rule, decreedecide with authority“The King decreed that all firstborn males should be killed”
(v)predominate, dominate, rule, reign, prevailbe larger in number, quantity, power, status or importance“Money reigns supreme here”, “Hispanics predominate in this neighborhood”
(v)rule, finddecide on and make a declaration about“find someone guilty”
(v)rulehave an affinity with; of signs of the zodiac
(v)rulemark or draw with a ruler“rule the margins”
(v)rule, harness, reinkeep in check“rule one's temper”
(v)rock, rule, kick ass, slaybe excellent or outstanding“I'm enjoying this. I know. This rules!” (How I Met Your Mother! - The Duel (2005)), “It rocks, but it can get a little dense.”, “A shot of tequila and then turn up the song, it kicks ass” (iZombie - Brainless in Seattle, Part 1 (2018)), “To say Ben slays in these photos is an understatement” (Huffington Post 17-02-06)