Phosphorus is combustible which means that it is flammable.
yes
Combustable liquids burn, all of them. Non combustable liquids, not so much.
Yes.
yes
fossil fuels
Only in extreme heat.
Water can be a product of combustion.
combustable
A combustable engine
if its combustable it releases energy when it burns
Sometimes there are gases that are combustable.
tasteless, colorless, non-combustable, gas (at STP)