The word "backslap" is often used to describe a congratulatory slap on the back, but there are plenty of other synonyms that can be used in its place. Some possible alternatives include "pat on the back," "high-fives," "hugs," "handshakes," and "thumbs up." Depending on the context, other options might include "applause," "cheers," "accolades," or "kudos." When looking for a synonym for "backslap," the key is to consider the overall tone and tenor of the interaction: Depending on the context, some synonyms might be more appropriate than others. Ultimately, however, all of these words convey a sense of approval, congratulations, and support.