hire – v. to give work or a job to (someone) in exchange for wages or a salary

substitute – n. a person or thing that takes the place of someone or something else

benefit – n. money that is paid by a company or by a government when someone dies, becomes sick or stops working

staff – v. to supply (an organization or business) with workers

librarian – n. a specialist in the care of books, magazines, documents and other records
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