storminess vs windiness

storminess and windiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
storminess	Yes	No	No	No
windiness	Yes	No	No	No

As nouns, windiness is a hyponym of storminess; that is, windiness is a word with a more specific, narrower meaning than storminess:

Other hyponyms of storminess include boisterousness, breeziness, tempestuousness, choppiness, rough water, roughness.

storminess (noun)	windiness (noun)
violent passion in speech or action	boring verbosity
the state of being stormy	a mildly windy state of the air