Masternodes (Also Spelt, “Master Nodes”)
Masternodes are also full nodes. What separates them from these nodes is that Masternodes incentivize node operators giving them the ability to administer core consensus functions upon running a blockchain.
Masternodes also serve the purpose of anonymizing transactions, clearing transactions, and participating in governance and voting. With Mining Pools taking up most of the resources through mining activities, a reduction of full nodes had been clearly seen. To resolve this, Masternodes act as full nodes complete with operators receiving rewards much like miners do within a PoW system.