fieriness vs heat

fieriness and heat both are nouns.

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

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

Other hypernyms of fieriness include high temperature, hotness.

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

Other hypernyms of fieriness include passion, warmth.

fieriness (noun)	heat (noun)
the heat or the color of fire	utility to warm a building
a passionate and quick-tempered nature	the presence of heat
	the trait of being intensely emotional
	the sensation caused by heat energy
	a preliminary race in which the winner advances to a more important race
	a form of energy that is transferred by a difference in temperature
	applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

fieriness (verb)	heat (verb)
	gain heat or get hot
	make hot or hotter
	arouse or excite feelings and passions
	provide with heat