An excavator is a type of heavy machinery used in construction and mining operations. It is typically used to dig, dredge, and mine materials from the ground. The term 'excavator' can be broken down into three words: DIGGER (6 letters), dredger (7 letters), and MINER (5 letters). A DIGGER is a machine used to dig into the ground, a dredger is a machine used to dredge or remove material from the bottom of a body of water, and a MINER is a person or machine that extracts minerals from the earth. Together, these three words form the term 'excavator, ' which is used to describe a powerful machine used for digging, dredging, and mining.