uproar vs combustion

uproar and combustion both are nouns.

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

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

uproar (noun)	combustion (noun)
loud confused noise from many sources	the act of burning something
a state of commotion and noise and confusion	a process in which a substance reacts with oxygen to give heat and light
	a state of violent disturbance and excitement