The term 'COUNT ON IT' can be represented by four different crossword solutions: ABACUS (6 letters), SURE (4 letters), YES (3 letters), and YOUBET (6 letters). An ABACUS is an ancient counting device consisting of a frame with beads that are moved to represent numbers. The word 'SURE' is used to express certainty or agreement. 'YES' is a simple affirmative answer. Finally, 'youbet' is an informal way of saying 'YES' or 'of course'. All of these words indicate that one can rely on something, which is the meaning of the phrase 'count on it'.