rocket propellent vs rocket fuel

rocket propellent and rocket fuel both are nouns.

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

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

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

Other synonyms of rocket propellent include rocket propellant.

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