The term CARPENTRY FASTENER can refer to four different solutions: TNUT (4 letters), WOODSCREW (9 letters), NAIL (4 letters), and SCREW (5 letters). A TNUT is a type of nut used in carpentry, usually made of metal or plastic, which is inserted into a pre-drilled hole and then tightened with a wrench. A WOODSCREW is a type of SCREW specifically designed for use in wood, with a pointed tip and a thread that allows it to be screwed into the wood. A NAIL is a metal fastener with a sharp point at one end and a flat head at the other, which is driven into the wood with a hammer. A SCREW is similar to a NAIL, but has a helical thread along its length which allows it to be screwed into the wood. Finally, BOTTOMSUP (9 letters) is a type of fastener used in carpentry, consisting of a metal plate with a threaded hole in the center, which is inserted into a pre-drilled hole and then tightened with a wrench.