I cannot believe how long I just spent looking for the last common word and it finally dawned on me that I’d played VARIEGATED but not variegate! It was like when I played STONED and not Stone in a game a while ago amd I complained on the forum how stupid I was, and Roddles very wittily remarked something to the effect that if I was going to play stoned then things like this will happen!
At least I realised this time before the game closed.