warmth vs tenderness

warmth and tenderness both are nouns.

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

As nouns, tenderness is a hyponym of warmth; that is, tenderness is a word with a more specific, narrower meaning than warmth:

Other hyponyms of warmth include uxoriousness.

warmth (noun)	tenderness (noun)
a quality proceeding from feelings of affection or love	a tendency to express warm and affectionate feeling
the quality of having a moderate degree of heat	a feeling of concern for the welfare of someone (especially someone defenseless)
the trait of being intensely emotional	a positive feeling of liking
the sensation caused by heat energy	warm compassionate feelings
a warmhearted feeling	a pain that is felt (as when the area is touched)