An antonym for the word ‘spectrum’ is ‘uniformity.’
Explanation: The term ‘spectrum’ refers to a range of different things, often seen in contexts like colors, sound waves, or a variety of opinions and ideas. For example, in physics, a light spectrum encompasses all the wavelengths of light, showcasing a multitude of colors. On the other hand, ‘uniformity’ suggests consistency or sameness without variation. When something is described as uniform, it means there is little to no diversity or range present. Thus, ‘uniformity’ stands in contrast to the concept of ‘spectrum’ by emphasizing a lack of diversity.