combustion vs tumult

combustion and tumult both are nouns.

Word	Noun	Adjective	Verb	Adverb
combustion	Yes	No	No	No
tumult	Yes	No	No	No

As nouns, tumult is a hypernym of combustion; that is, tumult is a word with a broader meaning than combustion:

Other hypernyms of combustion include garboil, tumultuousness, uproar.

combustion (noun)	tumult (noun)
the act of burning something	the act of making a noisy disturbance
a process in which a substance reacts with oxygen to give heat and light	violent agitation
a state of violent disturbance and excitement	a state of commotion and noise and confusion