forts

/F AO1 R T S/
noun
  1. 1

    A fortified defensive structure stationed with troops.

  2. 2

    Any permanent army post.

  3. 3

    An outlying trading-station, as in British North America.

verb
  1. 1

    To create a fort, fortifications, a strong point, or a redoubt.

Source: https://en.wiktionary.org/wiki/fort, https://en.wiktionary.org/wiki/forts