Chromogens are molecules that produce a color when exposed to certain chemicals or conditions. There are several synonyms for chromogen, including chromophore, pigment, colorant, dye, and tint. Chromophore refers specifically to the part of a molecule that produces color, while pigment, colorant, and dye refer to substances that are added to other materials to produce color. Tint is often used to describe a slight coloration or shade, while chromogen and chromophore are typically used in more scientific contexts. These synonyms are useful for describing various types of color-producing substances, from natural pigments found in plants to synthetic dyes used in textiles and other industries.