different between lionheartedness vs gallantry

English

lionhearted +? -ness

lionheartedness (uncountable)

From French galanterie, equivalent to gallant +? -ry.

gallantry (countable and uncountable, plural gallantries)

courage
- 1926, P. G. Wodehouse, 'Lord Emsworth and the Girl Friend', Penguin, Harmondsworth: 1992, p 98.
  'I have the greatest respect for the young lady to whom you refer. She behaved on a certain recent occasion - on two recent occasions - with notable gallantry and resource, and I won't have her bally-ragged.'
chivalrous courtliness, especially towards women
an instance of gallant behaviour or speech

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