cyclone vs typhoon

cyclone and typhoon both are nouns.

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

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

cyclone: a violent rotating windstorm
typhoon: a tropical cyclone occurring in the western Pacific or Indian oceans

Other hyponyms of cyclone include hurricane, tornado, twister.

cyclone (noun)	typhoon (noun)
a violent rotating windstorm	a tropical cyclone occurring in the western Pacific or Indian oceans
(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the Northern Hemisphere and clockwise in the southern