tepidness vs iciness

tepidness and iciness both are nouns.

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

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

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

tepidness (noun)	iciness (noun)
a warmness resembling the temperature of the skin	coldness due to a cold environment
lack of passion, force or animation	a lack of affection or enthusiasm