Synonyms for the term "girl-on-girl" encompass a variety of phrases that describe intimate relationships or interactions between two females. Some alternative expressions include "lesbian", which refers to women who are attracted to other women romantically, emotionally, or sexually. Another synonym is "sapphic", an adjective derived from the Greek poet Sappho, known for her love poems about women. "Same-sex female relationships" or "woman-to-woman connections" are neutral ways to describe such interactions without focusing on the sexual aspect. It's important to note that using respectful language and understanding the preferences of individuals involved is crucial when discussing personal and sensitive topics such as these.