reign

nouns

a period during which something or somebody is dominant or powerful
"he was helpless under the reign of his egotism"
reign
is a type of (narrower)
an amount of time
"a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"
period, period of time, time period
the period during which a monarch is sovereign
"during the reign of Henry VIII"
reign
is a type of (narrower)
an era of history having some distinctive feature
"we live in a litigious age"
age, historic period
royal authority; the dominion of a monarch
reign, sovereignty

verbs

have sovereign power
"Henry VIII reigned for a long time"
reign
is a type of (narrower)
exercise authority over; as of nations
"Who is governing the country now?"
govern, rule
be larger in number, quantity, power, status or importance
"Money reigns supreme here"; "Hispanics predominate in this neighborhood"
dominate, predominate, prevail, reign, rule