Ryan Hartkopf added the comment:
Personally, 'options' is the first word that comes to mind other than 'arguments' (which is confusing for obvious reasons). But I think we can all agree that any of these candidates are less ambiguous than 'optional arguments'! It's been 4 years, let's put this one to bed!
---------- nosy: +rhartkopf Added file: http://bugs.python.org/file37200/argparse_option.patch