wood — (noun) hard material from trees · nail — (noun) small metal pin used to join wood · hammer — (noun) tool for hitting nails · screw — (noun) metal pin that turns to join things · screwdriver — (noun) tool for turning screws · circuit — (noun) path for electricity to flow

timber — (noun) wood used in building · drill — (noun) tool for making holes · saw — (noun) tool for cutting wood · bolt — (noun) metal pin with a thread for fastening · nut — (noun) small piece with a hole that screws onto a bolt · component — (noun) part of a machine or device

router — (noun) tool for shaping wood · clamp — (noun) tool used to hold things tightly · circuit board — (noun) board with an electric circuit · transistor — (noun) device that amplifies or switches electrical signals · prototype — (noun) first version of a product · voltage — (noun) measure of electric force