Synonyms for Port of entry:

• n.

  •
  • boundary,
  • no man's land,
  • border,
  • line,
  • side,
  • frontier.
  •Other relevant words: (noun)
  • port.
  •point of entry (noun)
  • point of entry.

• Other synonyms:

  •
  • demarcation,
  • state line,
  • border crossing.