fieriness vs warmth

fieriness and warmth both are nouns.

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

As nouns, warmth is a hypernym of fieriness; that is, warmth is a word with a broader meaning than fieriness:

Other hypernyms of fieriness include heat, passion.

fieriness (noun)	warmth (noun)
the heat or the color of fire	a quality proceeding from feelings of affection or love
a passionate and quick-tempered nature	the quality of having a moderate degree of heat
	the trait of being intensely emotional
	the sensation caused by heat energy
	a warmhearted feeling