cyclone vs windstorm

cyclone and windstorm both are nouns.

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

As nouns, windstorm is a hypernym of cyclone; that is, windstorm is a word with a broader meaning than cyclone:

cyclone (noun)	windstorm (noun)
a violent rotating windstorm	a storm consisting of violent winds
(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the Northern Hemisphere and clockwise in the southern