org-roam/doc/anatomy.md

The bulk of Org-roam's functionality is built on top of vanilla Org-mode features. However, to support additional functionality, Org-roam adds several Org-roam-specific keywords. This functionality is not crucial to effective use of Org-roam.

File Aliases

Suppose you want a note to be referred to by different names (e.g. "World War 2", "WWII"). You may specify such aliases using the file #+ROAM_ALIAS attribute:

#+TITLE: World War 2
#+ROAM_ALIAS: "WWII" "World War II"