Besides Recruit Holdings (company), it's primarily recognized as a noun that refers to the act of recruiting someone. Synonyms are , and (). See this question, too.
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It's also used as an transitive suru-verb that means to recruit (someone). The closest Japanese synonym is , but this has a broader meaning, "to solicit (ideas, donations, etc)." is safe in most business settings, but () is probably the safer word in everyday life.
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We don't usually use as a noun that means "new member." The noun for that is (or , , , etc., depending on the type of the group). One exception is , which refers to a suit worn by job hunters, not by those who recruit them.