long-term, permanent
guaranteed (esp. AmE)
casual (BrE), fixed-term (BrE), short-term
three-year, two-year, etc.
formal, written
verbal
standard
legal, valid
void
The contract was declared void.

enforceable, unenforceable
binding, non-binding (AmE)
current, existing, new, original
big, huge, important, large, major
fat, lucrative
My advertising firm just won a lucrative contract with a cigarette company.

exclusive
business, commercial
employment, maintenance, research, service
catering (BrE), construction, production
defence/defense, military
federal, government
record, recording
marriage

have
Many workers do not have written contracts.

bid for, bid on (AmE), tender for
Eighteen companies are bidding for the contract.

award (sb), give sb, offer sb, place
get, land, receive, secure, win
lose
The firm lost the contract to a large London company.

negotiate
She managed to negotiate a permanent contract with the company.

draft, draw up, prepare, write
conclude, enter into, make, sign
He entered into a contract with his former employer.

extend, renew
carry out (BrE), execute, fulfil/fulfill
the company fulfilling the construction contract

honour/honor
cancel, end, repudiate (BrE,law), rescind (law, esp. BrE), terminate
Either party can terminate the contract at any time.

be subject to (esp. BrE)
The offer has been accepted, subject to contract (= the agreement is not legally binding before contracts are signed).

be in breach of, breach, break, violate
If you go on strike you will be in breach of contract.

enforce (law)
exchange (law)
The successful bidder must exchange contracts immediately and pay a deposit.

expire
The contract expires at the end of next year.

be worth sth
a series of major contracts worth millions

work, worker (= one on a fixed-term contract)
manufacturer
dispute, negotiation
award
extension
law

in a/the contract
They put a clause in the contract stipulating that the work should be finished by next month.

on a contract
He's on a three-year fixed-term contract.

under contract (to)
At that stage of her career she was still under contract to one of the big Hollywood studios.

under a/the contract
Under her contract of employment, Mrs Lee could not be required to work at a different site.

contract between
the contract between the employer and the employee

contract for
They won a contract for the delivery of five planes.

contract with
Do you have a contract with your employer?

(a) breach of contract
The company is being sued for breach of contract.

a contract of employment, a contract of sale
You should make sure that you have a formal contract of employment.

the terms of a contract
By using cheaper materials, the company has broken the terms of its contract.

under the terms of a contract
Under the terms of the contract the job should have been finished yesterday.

take out
have out
He has a contract out on you.

killer, killing

contract on
She took out a contract on her ex-husband.