warmheartedness vs affection

warmheartedness and affection both are nouns.

Word	Noun	Adjective	Verb	Adverb
warmheartedness	Yes	No	No	No
affection	Yes	No	No	No

As nouns, warmheartedness and affection are synonyms defined as:

Other synonyms of warmheartedness include affectionateness, fondness, heart, philia, tenderness, warmness.

warmheartedness (noun)	affection (noun)
a positive feeling of liking	a positive feeling of liking
a warmhearted feeling