ism

noun2

1. •
   An ideology, system of thought, or practice that can be described by a word ending in -ism.

   • An ism does not have to possess the fearful implements of state power to cut off a deviant or heretical member. — 1965
2. •
   A form of discrimination, such as racism or sexism.

   • Parents and educators play a critical role in helping children of all ages navigate current events and talk openly about the historical roots of the various ‘isms in our country. — 2020

noun3

1. •
   Abbreviation of interstellar medium.
2. •
   Initialism of industrial scientific medical.
3. •
   Initialism of Imperial Service Medal.