The antonyms for the word "invisible" could be "visible," "apparent," "clear," "obvious," "evident," or "perceptible." These words mean that something can be seen, noticed, or observed, unlike something that is invisible. For instance, a visible object is something that can be seen with the naked eye. If something is apparent, that means it is clear and distinct, and there is no confusion about its presence. Obvious is another antonym of invisible meaning something that can be easily noticed, recognized, or understood. Evident and perceptible both denote that something is noticeable, and their meaning somewhat overlaps with other antonyms.