urchins

noun
  1. 1

    A mischievous child.

  2. 2

    A street urchin, a child who lives, or spends most of their time, in the streets.

  3. 3

    A sea urchin.

  4. 4

    One of a pair in a series of small card cylinders arranged around a carding drum; so called from its fancied resemblance to the hedgehog.

  5. 5

    A neutron-generating device that triggered the nuclear detonation of the earliest plutonium atomic bombs.

  6. 6

    A hedgehog.

  7. 7

    A mischievous elf supposed sometimes to take the form of a hedgehog.

Source: https://en.wiktionary.org/wiki/urchin, https://en.wiktionary.org/wiki/urchins