When referring to the two sexes, there are a variety of synonyms that can be used instead of "men and women". Some of these terms include "male and female" which is a scientific and clinical term that is commonly used in academic literature. "Gentlemen and ladies" is another phrase that is often used in social situations to refer to men and women respectively. "Guys and gals" is a more casual and colloquial term, which is often used in a friendly tone. "Him and her" is also a common phrase, particularly in romantic contexts. Finally, there is "boys and girls", which is a more informal synonym for "men and women".