donation vs giving

donation and giving both are nouns.

Word	Noun	Adjective	Verb	Adverb
donation	Yes	No	No	No
giving	Yes	Yes	No	No

As nouns, giving is a hypernym of donation; that is, giving is a word with a broader meaning than donation:

donation: act of giving in common with others for a common purpose especially to a charity
giving: the act of giving

Other hypernyms of donation include gift.

donation (noun)	giving (noun)
act of giving in common with others for a common purpose especially to a charity	the act of giving
a voluntary gift (as of money or service or ideas) made to some worthwhile cause	disposing of property by voluntary transfer without receiving value in return
	the imparting of news or promises etc.

donation (adjective)	giving (adjective)
	given or giving freely