Propellant
Part of speech: noun
Definition: anything that propels fuel, oxidizer, reaction mass or mixture for one or more engines (especially internal combustion engines or jet engines) that is carried within a vehicle prior to use the compressed gas in a pressurised container (especially an aerosol can) that is used to expel a liquid
Part of speech: adjective
Definition: Capable of propelling.
Dynamical
Part of speech: adjective
Definition: dynamic