Is charity a concrete noun

No, the noun 'charity' is an abstract noun, a Word for actions or donations to aid the poor or needy; a Word for an organization set up to provide help and raise money for those in need; a Word for a concept.

A concrete noun is a Word for something that can be experienced by any of the five physical senses; something that can be seen, heard, smelled, tasted, or touched. You may see or touch money donated for charity or the homeless shelter provided by a charity, but the charity itself is something that is understood about them.