affection vs tenderness

affection and tenderness both are nouns.

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

As nouns, affection and tenderness are synonyms defined as:

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

affection (noun)	tenderness (noun)
a positive feeling of liking	a tendency to express warm and affectionate feeling
	a feeling of concern for the welfare of someone (especially someone defenseless)
	a positive feeling of liking
	warm compassionate feelings
	a pain that is felt (as when the area is touched)