1) Become faded 2) Bruise 3) Cause to lose or change color 4) Change 5) Fade 6) Fade or stain 7) Lose color or turn colorless 8) Make dingier 9) Run in the wash 10) Tarnish 11) To change or lose color Found on https://www.crosswordclues.com/clue/discolor
• (v. t.) To alter the true complexion or appearance of; to put a false hue upon. • (v. t.) To alter the natural hue or color of; to change to a different color; to stain; to tinge; as, a drop of wine will discolor water; silver is discolored by sea water. Found on http://thinkexist.com/dictionary/meaning/discolor/
Dis·col'or transitive verb [ imperfect & past participle Discolored ; present participle & verbal noun Discoloring .] [ Middle English descolouren , Old French descolorer , French décolorer , from Latin dis- Found on http://www.encyclo.co.uk/webster/D/77