The term "be horizon" refers to the point where the sky meets the earth. The antonyms for "be horizon" would be the different directions in which we can look away from the horizon. These directions include upward, downward, leftward, rightward, frontward, and backward. The opposite of horizon also refers to the different types of landscapes one can observe in different directions, such as mountains, valleys, forests, beaches, plains, and lakes. The antonyms of "be horizon" are limitless, as the term simply refers to the point of connection between the earth and the sky and there are countless directions to look in beyond the horizon.