anything that ends with the sound -able or -UL
doable, edible, beautiful, adorable, etc.
Adjustable.
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
Phosphorus is combustible which means that it is flammable.
A combustable engine
if its combustable it releases energy when it burns
Sometimes there are gases that are combustable.