Synonyms for Polychrome (same or very similar meaning)
WordNet sense 1 (having or exhibiting many colors):
polychromatic, polychromicWordNet sense 2 (having color or a certain color; sometimes used in combination):
colored, colorful, colouredWordNet sense 3 (color with many colors; make polychrome):
polychromise, polychromizeFrom the ODE community, based on WordNetadd/edit