The word "gestate" is an uncommon and specific term that refers to the process of carrying a fetus in the womb. However, there are several synonyms that one can use in place of the term. One such synonym is "pregnant," which is a commonly used term for women who are carrying a child. Another synonym is "gravid," which is a more formal term that emphasizes the state of being pregnant. One can also use the term "expecting," which implies that something is coming in the future. Other synonyms for "gestate" include "to conceive," "to carry," "to bear," and "to incubate." Each of these terms has a slightly different connotation, but all refer to the process of creating new life.