combustion
combustion chamber

engine
internal combustion engine

internal
internal combustion engine

lively
a lively combustion

pre-combustion
pré-combustão

product
product of combustion

rapid
rapid combustion

rate
rate of combustion

residual
residual of combustion

residue
residue of combustion

slow
slow combustion

smokeless
smokeless combustion

spontaneous
...spontaneous combustion / spontaneous ignition

stove
slow-combustion stove

surface
surface combustion