combustion vs oxidation

combustion and oxidation both are nouns.

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

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

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

Other hypernyms of combustion include oxidisation, oxidization.

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