I went and added a wiki for worksheet-function and then tried to add the synonym excel-formula, but because there are more instances of excel-formula it wouldn't allow it.
We should be using worksheet-function because of other spreadsheet apps, instead of using the more specific excel-formula (any tagging of this for Excel problems should use the excel tag also).
How do I get this synonym implemented?
EDIT: Ok, worksheet-function now exceeds excel-formula so I've created a synonym here. Please vote for it if you're able.