ADJ

basic, cardinal, first, fundamental, golden
ground ~s
You and your flatmates should establish some ground rules
general
formal, official, written
informal, unwritten
rigid, strict, stringent
absolute, hard and fast
There are no hard and fast rules when it comes to choosing a typeface
clear
simple
Follow these few simple rules, and you won't go far wrong
arbitrary
petty
He made his children's lives a misery with all his petty rules
club, company, competition, school, union, etc.
cultural, ethical, legal, moral, social
disciplinary, immigration, safety, tax
grammar, grammatical

QUANT

set
The aim is to get each member country to adhere to a single set of rules

VERB + RULE

draw up, establish, formulate, impose, issue, lay down, make, set out
abide by, adhere to, follow, go by, obey, observe, play by, stick to
If he wanted a loan he would have to play by the bank's rules
be in line with, conform to
The packaging does not conform to EU rules
be in breach of, break, disregard, fall foul of, flout, violate
Their action was in breach of Stock Exchange rules
apply, enforce
The referee applied the rules to the letter (= very strictly)
bend, relax
Couldn't they just bend the rules and let us in without a ticket?
waive
tighten up
The rules on claiming sickness benefit have been tightened up
be bound by, be fettered by, be governed by
Social workers are bound by rules of confidentiality
interpret, understand
The punishment depends on how the umpire interprets the rules

RULE + VERB

apply, be applicable, operate
provide sth, say sth, state sth, stipulate sth
The competition rules provide that a cash alternative may be given
govern sth
the rules governing the importing of livestock
allow (for) sth, permit sth
The existing rules allow for some flexibility
forbid sth, prohibit sth
limit sth, restrict sth
rules limiting imports

RULE + NOUN

book
The officials went strictly by the rule book

PREP

according to the ~s
According to the rules, no alcohol can be consumed on the premises
against/contrary to the ~s
Tackling a player without the ball is against the rules
in accordance with the ~s
The music was turned off at midnight, in accordance with the rules
outside the ~s
behaviour which is outside the rules
under a/the ~
Under this rule, only full members of the club are entitled to vote
within the ~s
I believed I was acting within the rules
~ about/ concerning/on/regarding/relating to
What are the school rules about dress?
~ for
There seems to be one rule for the rich and another for the poor. What is the rule for forming plurals?
~ of
the rules of the game

PHRASES

a breach/violation of the rules, a body/code/network/system of rules, respect for the rules, rules and regulations

ADJ

general
There are few exceptions to the general rule that shops close at six o'clock

PREP

as a ~
As a rule, hardly anybody uses this road

PHRASES

be the rule
Among her friends, casual dress and a relaxed manner are the rule

ADJ

authoritarian, harsh
direct, indirect
emergency
The president imposed emergency rule following the riots
majority
one-party
Labour, Tory, etc.
colonial
home
civilian, military
presidential
mob
the lawless days of mob rule

VERB + RULE

impose

PREP

under … ~
The country remained under direct rule by the occupying powers

PHRASES

the rule of law
a society based on the rule of law