portholes

/P AO1 R T HH OW0 L Z/
noun
  1. 1

    A gunport; an opening in the hull of a ship through which cannon are fired.

  2. 2

    A circular window set in the hull of a ship.

Synonyms

Source: https://en.wiktionary.org/wiki/porthole, https://en.wiktionary.org/wiki/portholes