TBFF is an acronym that stands for "to be friends forever". There are several synonyms that can be used instead of TBFF, including "lifelong friends", "close comrades", "dearest buddies", "constant companions" and "unbreakable pals". Each of these synonyms emphasizes the strength and longevity of the friendship bond. These terms highlight the enduring nature of true friendship, implying that such relationships will endure through thick and thin. Regardless of the term used, the sentiment remains the same- that these are the people who we will trust and rely on throughout our lives, and who will always be there for us.