There have been a couple of implementation suggestions in this thread, but if I might add one more: Use frontmatter. So for a note called “Getting Things Done”, have the frontmatter:
---
alias: GTD, GTD Method
---
[note content]
and then [[Getting Things Done]], [[GTD]] and [[GTD Method]] will all link to the “Getting Things Done” note.
Currently, as a (not ideal) workaround, I’ve been creating alias pages that just link to the correct page. In the example above, I’d have a “GTD” note which solely contains
see: [[Getting Things Done]]]
Alternatively, you could use the wiki-like idea of “redirect pages” where you create an alias page like I do, then specify the redirect in the frontmatter like so:
---
redirect: [[Getting Things Done]]
---
Then it would be up to Obsidian to redirect to “Getting Things Done” when you click on [[GTD]], and also perhaps to remove “alias” notes on the graph while keeping (redirected) links in-tact.
Now that I’ve written it out like that it sounds messy as hell. Maybe just not that option…