If a word conforms to a special rule, I call it a Plot Word™.
Use the following examples to find the rule.
In case you want it as a CSV:
Plot Words™, Not Plot Words™ fox, wolf may, june wall, walk pork, ham beef, cow cage, coop spoon, fork cull, call gun, knife face, mind hedge, shrub room, house
The puzzle relies on the series' inbuilt assumption, that each word can be tested for whether it is a Plot Word™ or not on its own.
These are not the only examples of Plot Words™, many more exist.
The original name for this puzzle was What is a Graph Word™?
1 is 01, 2 is 02, 3 is 03 and so on.