rocket fuel vs rocket propellent

rocket fuel and rocket propellent both are nouns.

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

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

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

Other synonyms of rocket fuel include rocket propellant.

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