rocket propellent vs rocket propellant

rocket propellent and rocket propellant both are nouns.

Word	Noun	Adjective	Verb	Adverb
rocket propellent	Yes	No	No	No
rocket propellant	Yes	No	No	No

As nouns, rocket propellent and rocket propellant are synonyms defined as:

rocket propellent and rocket propellant: an explosive charge that propels a rocket

Other synonyms of rocket propellent include rocket fuel.

rocket propellent (noun)	rocket propellant (noun)
an explosive charge that propels a rocket	an explosive charge that propels a rocket