When it comes to finding synonyms for the term "TAC SIT", several alternatives may come to mind. One possible substitution could be "silent communication", as both phrases describe a situation where messages are conveyed without the use of words. Another option might be "non-verbal exchange", emphasizing the absence of spoken language in the interaction. Additionally, "gestural dialogue" could be utilized, highlighting the significance of physical movements and expressions to convey meaning. Finally, "wordless conversation" aptly encapsulates the essence of "TAC SIT", as it highlights the absence of verbal communication to convey ideas, feelings, or intentions. Ultimately, these synonyms provide suitable alternatives to describe situations where words are not utilized to transmit information.