If a word conforms to a special rule, I call it a mediocre word. Here is a list of examples:
In CSV format:
Mediocre Words™,Non-Mediocre Words™
What is the rule to tell whether a word is a Mediocre Word™ or not? Why is it called a Mediocre Word™?
(Note that each word can be tested for whether it is a Mediocre Word™ on its own, without looking at any of the other words in the list of examples.)