See munificence in Webster's New World Roget's A-Z Thesaurus II
noun
The quality or state of being generous:
big-heartedness, bounteousness, bountifulness, freehandedness, generosity, generousness, great-heartedness, large-heartedness, lavishness, liberality, magnanimity, magnanimousness, openhandedness, unselfishness, unsparingness. See give
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