Synonyms for Rule the roost:

• v.

  •be in charge of a place (verb)
  • wear the pants,
  • ride herd,
  • play first fiddle.

• Other synonyms:

  •dominate
  • preponderate,
  • run the show.
  •domineer
  • run things.
  •Other relevant words:
  • direct,
  • order,
  • lead,
  • command,
  • occupy the throne,
  • call the shots,
  • hold sway,
  • dominate,
  • prevail,
  • dictate,
  • master,
  • reign,
  • manage,
  • bestride,
  • shot,
  • supervise,
  • predominate,
  • wear the crown,
  • govern,
  • domineer,
  • control.