Interestingly though, the full OED recognises 'overworn' both as the past particple of 'overwear'
https://ibb.co/mX2kj0d
and as an adjective in its own right
https://ibb.co/x8qkK93
Channel 4’s Daytime favourite, Countdown, is changing with the times.
Over thirty years since the launch of the long running series, Countdown is replacing the traditional print version of the Oxford Dictionary of English with Oxford Dictionaries Online.
The change will mean that the programme’s ‘Dictionary Corner’, fronted by Susie Dent, will now be using oxforddictionaries.com to search for words as the contestants try to beat the famous Countdown clock."
"From the beginning of Series 71, the validity of words is now determined using the Premium version of Oxford Dictionaries Online (ODO). The paper dictionaries in Dictionary Corner have been replaced with a laptop. A free version of ODO (now called Lexico) is used by the show's director, who can overrule a valid word which otherwise does not appear in premium, as a back-up source. The overruling is cut from final broadcast."
Why then, do they not just use the same version as the Director?
oxforddictionaries.com now redirects to languages.oup.com, which is the Oxford Languages site. That, in turn, offers the full OED as its main dictionary, which does include 'overworn':
https://languages.oup.com/dictionaries/
amazed and shocked
english dictionaries are avowedly non prescriptive
( not - - do this! dont do that!)
and so 'wrong' words: "uninterested" does NOT mean "disinterested" ARE listed as meanings - because they are used, even tho in the wrong sense