What is a Scheming Word™?

_{In the spirit of the What is a Word™/Phrase™ series started by JLee, a special brand of Phrase™ and Word™ puzzles.}

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If a word conforms to a special rule, I call it a Scheming Word™.
Use the examples below to find the rule.

                                    * These are Naturally Scheming Words™

And, if you want to analyze, here is a CSV version:

Scheming Words™,Not Scheming Words™
ALIENIST,NATURALIST
AREAR,FORWARD
CARVERY*,CHURRASCARIA
CHASTER,CHASER
FISHIEST,FRANKEST
HARSHER*,GENTLER
HEH*,MEH
PEP*,POP
RACECAR*,REVIVER
REAR,FRONT
SHAVEN,SHAGGY
TEAT,BOSOM
YEATSIAN,KEYNESIAN

The puzzle satisfies the series’ inbuilt assumption, that each word can be tested for whether it is a Scheming Word™ without relying on the other words.

What is the special rule these words conform to?