A lag bolt is a type of fastener used to secure wood and other materials together. However, there are several synonyms for the word lag bolt that can be used interchangeably. Some of the common synonyms for lag bolts include coach screws, timber screws, and lag screws. These synonyms perform the same function as lag bolts, and they are perfect for connecting two materials together for a strong, secure hold. Other synonyms for lag bolt include wood screw, spindle screw, and hex head bolt. Regardless of the synonym used, all these fasteners are designed to provide a firm attachment for various kinds of construction projects.