Male, female
Words referring to male and female people.
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                  What general words refer to the difference between male and female?
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                  What pairs of words refer to male and female people?
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                  What words refer to something (such as a plant) that is neither male nor female?
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                  What words refer to something (such as a plant) that is both male and female?
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                  What words describe something to do with the sex of a person?
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                  What words describe a school or organization that includes males and females?
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                  What words describe a school or organization that includes only males or females?
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                  What words refer to a person of the other sex?
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                  What words refer to problems between men and women?