The term "let hook" can have a variety of synonyms depending on the context and specific usage. Some possible alternatives include "connect," "attach," "link," "join," "fasten," or "secure." In a fishing context, synonyms might include "bait," "cast," "reel in," or "catch." In a social context, "let hook" could be replaced with "meet," "introduce," "connect with," or "network." Other possible synonyms might include "unite," "merge," "fuse," or "combine." Overall, the specific synonym used for "let hook" will depend on the intended meaning and context in which the phrase is used.