tepidness vs coolness

tepidness and coolness both are nouns.

Word	Noun	Adjective	Verb	Adverb
tepidness	Yes	No	No	No
coolness	Yes	No	No	No

As nouns, coolness is a hypernym of tepidness; that is, coolness is a word with a broader meaning than tepidness:

Other hypernyms of tepidness include chilliness, coldness, frigidity, frigidness, iciness.

tepidness (noun)	coolness (noun)
a warmness resembling the temperature of the skin	the property of being moderately cold
lack of passion, force or animation	a lack of affection or enthusiasm
	fearless self-possession in the face of danger
	calm and unruffled self-assurance