It didn’t take that long. These are relatively simple regular expressions. Only I had to think about some of the possible issues, and occasionally check if there were uses online of a particular example. Something like Erchin was an unexpected case to handle. I still don’t know whether people write Yaddayim or Yadayyim, both of which I’ve excluded, but maybe should include just because overgenerating in this case is better than undergenerating.

So to give some examples, ברכות can be any of:
[Berachos, Brachos, Berochos, Brochos, Berakhos, Brakhos, Berokhos, Brokhos, Beracos, Bracos, Berocos, Brocos, Berakos, Brakos, Berokos, Brokos, Berachot, Brachot, Berochot, Brochot, Berakhot, Brakhot, Berokhot, Brokhot, Beracot, Bracot, Berocot, Brocot, Berakot, Brakot, Berokot, Brokot]
Many of these are unrealistic because they mix types of conventions / dialects that people are likely to use, but they’re at least all-encompassing, I hope.

Or ערובין is:
['eruvin, eruvin, 'eiruvin, eiruvin, 'eyruvin, eyruvin, 'ayruvin, ayruvin, 'airuvin, airuvin, 'erubin, erubin, 'eirubin, eirubin, 'eyrubin, eyrubin, 'ayrubin, ayrubin, 'airubin, airubin]

בבא מציעא returns the most with 256 alternatives (and that’s without allowing no e in Metzia)! מועד קטן closely follows with 240