to ignite; to combust; to burn; combustion; flaming

fuel

to ignite; to light; fig. to spark off (hopes, controversy, flames of revolution)

fuel oil

fire bomb; incendiary device

to ignite; to set on fire; aflame

(attributive) internal combustion

inflammable

to ignite; to start (a fire); (fig.) to spark (debate, conflict etc)

to deflagrate