This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.
If a word conforms to a special rule, I call it a Rotting Word™.
Use the examples below to find the rule.
$$ % set Title text. (spaces around the text ARE important; do not remove.) % increase Pad value only if your entries are longer than the title bar. % \def\Pad{\P{0.0}} \def\Title{\textbf{ Rotting }} % \def\S#1#2{\Space{#1}{20px}{#2px}}\def\P#1{\V{#1em}}\def\V#1{\S{#1}{9}} \def\T{\Title\textbf{Words}^{\;\!™}\Pad}\def\NT{\Pad\textbf{Not}\T\ } \smash{\lower{29px}\bbox[#ccee00]{\phantom{\rlap{rubio.2019.05.15}\S{6px}{0} \begin{array}{cc}\Pad{\T}&{\NT}\\\end{array}}}}\atop\def\V#1{\S{#1}{5}} \begin{array}{|c|c|}\hline\Pad\T&\NT\\\hline % \text{ admin}&\text{ job}\\ \hline \text{ box}&\text{ tube}\\ \hline \text{ dawn}&\text{ sleep}\\ \hline \text{ elm}&\text{ river}\\ \hline \text{ fang}&\text{ stun}\\ \hline \text{ fusion}&\text{ bomb}\\ \hline \text{ lean}&\text{ wheel}\\ \hline \text{ opal}&\text{ spots}\\ \hline \text{ open}&\text{ hotel}\\ \hline \text{ pawn}&\text{ bug}\\ \hline \hline \end{array}$$
CSV version:
Rotting Words™, Not Rotting Words™
admin, job
box, tube
dawn, sleep
elm, river
fang, stun
fusion, bomb
lean, wheel
opal, spots
open, hotel
pawn, bug
What is the special rule that Rotting Words™ conform to?
What is special about the Not Rotting Words™?