The term 'CORN UNIT' is composed of four words that are related to the agricultural crop corn. The first word is 'EAR, ' which is a three-letter word that refers to the part of the corn plant that contains the kernels. The second word is 'KERNEL, ' which is a six-letter word that refers to the individual grains of corn that are found inside the EAR. The third word is 'COB, ' which is a three-letter word that refers to the central core of the EAR of corn, which is covered in kernels. The fourth and final word is 'CAN, ' which is a three-letter word that refers to the container used to store and transport corn. Together, these four words form the term 'CORN UNIT, ' which is a unit of measurement for corn.