cyclone vs hurricane

cyclone and hurricane both are nouns.

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

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

cyclone: a violent rotating windstorm
hurricane: a severe tropical cyclone usually with heavy rains and winds moving at 63-136 knots (12 on the Beaufort scale)

Other hyponyms of cyclone include tornado, twister, typhoon.

cyclone (noun)	hurricane (noun)
a violent rotating windstorm	a severe tropical cyclone usually with heavy rains and winds moving at 63-136 knots (12 on the Beaufort scale)
(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the Northern Hemisphere and clockwise in the southern