warrens

noun
  1. 1

    The system of burrows where rabbits live.

  2. 2

    An enclosed piece of land set aside for breeding game, especially rabbits.

  3. 3

    A mazelike place of dark alleys etc in which it's easy to lose oneself; especially one that may be overcrowded.

  4. 4

    A heart-shaped hoe.

Source: https://en.wiktionary.org/wiki/warren, https://en.wiktionary.org/wiki/warrens