Halftoning is a printing technique that is used to produce a gradient or tonal effect using dots. This technique creates the appearance of shading by varying the size and spacing of the dots. Synonyms for halftoning include dithering, stippling, screening, and gradation. Dithering is a technique that involves adding noise to an image to reduce the number of colors used and give the illusion of more colors. Stippling is a technique that involves using dots of a fixed size and spacing to create shades. Screening is another term used for halftoning, as it involves creating a dot pattern to represent the various tones in an image. Gradation refers to the transition of colors from lighter to darker shades.