If a word conforms to a certain rule, I call it a Complete Word™. Use the following examples to find the rule:
|Complete Words™||Not Complete Words™|
Complete Words™, Not Complete Words™ Ben,Bill Beat,Slap Geek,Nerd Abbey,Church Aching,Tiring Balding,Receding Abdicating,Renouncing
These aren't the only Complete Words™, there are others that exist.
As a bonus, (when it's possible to do so) I will award a bounty to the person that finds the longest Complete Word. This must be a real word (in English). The bounty will be awarded 24 hours after the accepted answer.
If I'm not allowed to do the above, please tell me to edit.
Edit: Correct answer has been identified and accepted at 22:45 GMT 7th March 2018.