noun / adjective
cult
KUHLT/kʌlt/
An organized system of intense devotion to a figure or belief.
Two cult members kneel in reverence before their seated leader.

Etymology
Latin cultus joined the ideas of tending and reverence. English used cult for worship or a system of worship; the focus on devotion connects those meanings to the modern sense of a devoted group.
In context
you are in a cult or a very high control group.
More examples
- The cult requires members to obey its leader without question.
- The ancient cult honors its deity through seasonal rituals.
- The film remains a cult favorite decades after its release.
Forms
cult · cults
cultist noun — A person who belongs to a cult.