What's the difference between fire and combustion?

Answer 1

fire is the uncontroled combustion while combustion is the controlled fire,for example combustion in the engine cylinder controlled by foot padle.

Answer 2

fire is a form of combustion. Combustion is a self-sustaining chemical reaction that yields energy or products that cause further reactions of the same kind. Fire is a rapid, self-sustaining oxidation process accompanied by the evolution of heat and light of varying intensities.