This puzzle is based off the What is a Word™ and What is a Phrase™ series started by JLee and their spin-off What is a Number™ series.
If a word conforms to a certain rule, I call it an Infinite Word™. Use the following examples to find the rule:
$$ % set Title text. (spaces around the text ARE important; do not remove.) % increase Pad value only if your entries are longer than the title bar. % \def\Pad{\P{1.0}} \def\Title{\textbf{ Infinite }} % \def\S#1#2{\Space{#1}{20px}{#2px}}\def\P#1{\V{#1em}}\ \def\V#1{\S{#1}{9}} \def\T{\Title\textbf{Words}^{\;\!™}\Pad}\def\NT{\Pad\textbf{Not}\T\ }\displaystyle \smash{\lower{29px}\bbox[yellow]{\phantom{\rlap{rubio.2018.03.05}\S{6px}{0} \begin{array}{cc}\Pad\T&\NT\\\end{array}}}}\atop\def\V#1{\S{#1}{5}} \begin{array}{|c|c|}\hline\Pad\T&\NT\\\hline % \text{OMISSION}&\text{HYPOCRISY}\\ \hline \text{JEALOUSY}&\text{OBLIVIOUS}\\ \hline \text{OFFSTAGE}&\text{ISOLATION}\\ \hline \text{YAWNER}&\text{EXCITER}\\ \hline \text{SOCIETAL}&\text{MISANTHROPE}\\ \hline \text{FRENZIED}&\text{HOEDOWN}\\ \hline \text{YACHTSWOMEN}&\text{KLEPTOMANIACS}\\ \hline \text{VACUOUS}&\text{PHILOSOPHIC}\\ \hline \text{UNSOCIAL}&\text{SEGREGATION}\\ \hline \text{IMMOLATE}&\text{ZEPPELIN}\\ \hline \text{HEATEDLY}&\text{HEAT}\\ \hline \text{QUESTION}&\text{WEASEL}\\ \hline \text{SEPULCHER}&\text{JAIL}\\ \hline \text{ESCAPISM}&\text{WONDER}\\ \hline \text{MUTATION}&\text{UNIQUE}\\ \hline \text{TRICKERY}&\text{OPINION}\\ \hline \text{VERIFIED}&\text{VALIDATION}\\ \hline \end{array}$$
The puzzle satisfies the series' inbuilt assumption, that each word can be tested for whether it is a Infinite Word™ without relying on the other words.
These are not the only examples of Infinite Words™, many more exist.
CSV version for Analysis:
OMISSION,HYPOCRISY
JEALOUSY,OBLIVIOUS
OFFSTAGE,ISOLATION
YAWNER,EXCITER
SOCIETAL,MISANTHROPE
FRENZIED,HOEDOWN
YACHTSWOMEN,KLEPTOMANIACS
VACUOUS,PHILOSOPHIC
UNSOCIAL,SEGREGATION
IMMOLATE,ZEPPELIN
HEATEDLY,HEAT
QUESTION,WEASEL
SEPULCHER,JAIL
ESCAPISM,WONDER
MUTATION,UNIQUE
TRICKERY,OPINION
VERIFIED,VALIDATION