Ship-building wood is a type of wood used in the construction of ships. TEAK (4 letters) and ELM (3 letters) are two of the most commonly used woods for this purpose. TEAK is a tropical hardwood that is known for its durability and resistance to rot, while ELM is a deciduous hardwood that is known for its strength and flexibility. Both woods are highly sought after for their ability to withstand the harsh conditions of the sea.