windstorm vs tempest

windstorm and tempest both are nouns.

Word	Noun	Adjective	Verb	Adverb
windstorm	Yes	No	No	No
tempest	Yes	No	No	No

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

Other hyponyms of windstorm include cyclone, dust storm, duster, sandstorm, sirocco, whirlwind.

windstorm (noun)	tempest (noun)
a storm consisting of violent winds	(literary) a violent wind
	a violent commotion or disturbance