The term 'Core of an Ear' can be represented by two words in a crossword puzzle: CORNCOB (7 letters) and COB (3 letters). CORNCOB is a combination of the words 'CORN' and 'COB, ' which refer to the central part of an ear of CORN. The COB is the edible part of the CORN, which is composed of tightly packed kernels that are attached to a hard, fibrous core. The COB portion of the word refers to the core of the ear of CORN, which is the tough, fibrous center of the COB.