oxidation vs combustion

oxidation and combustion both are nouns.

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

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

oxidation: the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction
combustion: a process in which a substance reacts with oxygen to give heat and light

Other hyponyms of oxidation include calcination, burning, nitrification, rust, rusting.

oxidation (noun)	combustion (noun)
the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction	the act of burning something
	a process in which a substance reacts with oxygen to give heat and light
	a state of violent disturbance and excitement