Molly said:

Now I think about it, I don't think the word 'Sith' was ever used in the OT. Nor was padawan, Padme or pod race.

Correct, although Dark Lord of the Sith was in the novelization, and there are apparently notes from the '70s which have the name Mace Windu and the term Padawan in them.

That is true, though his name was originally Mace Windy not Windu lol. Ive always like the padawan name to be honest. Mace Windy sounds like he suffered from unusual amounts of ermm......gas lol.