The term "procrustean rule" is often used to describe a rigid or inflexible standard that does not allow for exceptions or individual differences. Synonyms for this term include "rigid standard," "uncompromising practice," and "inflexible regulation." Other similar terms include "one-size-fits-all approach," "cookie-cutter solution," and "dogmatic rule." These terms all describe a narrow-minded focus on enforcing a rule or standard, sometimes at the expense of others. It's important to remember that while rules and standards may be necessary, they should also be flexible enough to account for individual variances and unique situations.