firestorm vs contestation

firestorm and contestation both are nouns.

Word	Noun	Adjective	Verb	Adverb
firestorm	Yes	No	No	No
contestation	Yes	No	No	No

As nouns, contestation is a hypernym of firestorm; that is, contestation is a word with a broader meaning than firestorm:

firestorm: an outburst of controversy
contestation: a contentious speech act; a dispute where there is strong disagreement

Other hypernyms of firestorm include arguing, argument, contention, controversy, disceptation, disputation, tilt.

firestorm (noun)	contestation (noun)
an outburst of controversy	a contentious speech act; a dispute where there is strong disagreement
a storm in which violent winds are drawn into the column of hot air rising over a severely bombed area