DISCOLOUR is a term used to describe a change in the colour of something, usually caused by external factors. The crossword solutions for this term include STAIN (5 letters), FADE (4 letters), TARNISH (7 letters), BRUISE (6 letters), OXIDISE (7 letters), BLUR (4 letters), DIRTY (5 letters), DETERIORATE (11 letters), DISGRACE (8 letters), CONTAMINATE (11 letters), BESMIRCH (8 letters) and BLOT (4 letters). These words all describe different ways in which the colour of something can be changed, either through physical damage, chemical reactions, or dirt and grime.