link up, connect, link, unite, join - be or become joined or united or linked; "The two streets connect to become a highway"; "Our paths joined"; "The travelers linked up again at the airport"

intercommunicate - be interconnected, afford passage; "These rooms intercommunicate"

connect, link, link up, tie - connect, fasten, or put together two or more pieces; "Can you connect the two loudspeakers?"; "Tie the ropes together"; "Link arms"