COLOUR is a playable word

colour Scrabble® Dictionary

verb
coloured, colouring, colours
to color
19 Playable Words can be made from "COLOUR"
   2-Letter Words (2 found)
   3-Letter Words (10 found)
   4-Letter Words (4 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)