balminess vs mildness

balminess and mildness both are nouns.

Word	Noun	Adjective	Verb	Adverb
balminess	Yes	No	No	No
mildness	Yes	No	No	No

As nouns, mildness is a hypernym of balminess; that is, mildness is a word with a broader meaning than balminess:

Other hypernyms of balminess include clemency.

balminess (noun)	mildness (noun)
the quality of weather that is deliciously mild and soothing	mercifulness as a consequence of being lenient or tolerant
	acting in a manner that is gentle and mild and even-tempered
	good weather with comfortable temperatures