intercommunication
in·ter·com·munication
noun
1.
mutual communication; communication with each other
- “they intercepted intercommunication between enemey ships”
Origin
From inter- + communication.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.