When it comes to the term "face-to-face," there are a plethora of synonyms that can be used to suit different occasions. For example, "in-person" or "person-to-person" could be used in a business context when meetings are held physically instead of virtually. "Eye-to-eye" or "eyeball-to-eyeball" are perfect synonyms for situations that involve intense conversations or confrontations. "Directly" or "personally" could be used in casual conversations to indicate that the speaker interacted with someone physically. "Vis-à-vis" is a French term that literally means face-to-face and can be used to show the same proximity trait. Finally, "unmediated" can be used to show that there were no intermediaries present in a face-to-face interaction.