Philanthropy is a related term of charitableness.
In uncountable|lang=en terms the difference between philanthropy and charitableness
is that
philanthropy is (uncountable) benevolent altruism with the intention of increasing the well-being of mankind while
charitableness is (uncountable) the quality of being charitable.
As nouns the difference between philanthropy and charitableness
is that
philanthropy is (uncountable) benevolent altruism with the intention of increasing the well-being of mankind while
charitableness is (uncountable) the quality of being charitable.