Synonyms of 'insider'
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An employee is a person who is paid to work for an organization or for another person.
Many of the company's employees are women.
Workers are people who are employed in industry or business and who are not managers.
Wages have been frozen and workers laid off.
Thesaurus for insider from the Collins English Thesaurus
An insider is someone who is involved in a situation and who knows more about it than other people.