turbojet vs turbofan engine

turbojet and turbofan engine both are nouns.

Word	Noun	Adjective	Verb	Adverb
turbojet	Yes	No	No	No
turbofan engine	Yes	No	No	No

As nouns, turbojet and turbofan engine are synonyms defined as:

turbojet and turbofan engine: a jet engine in which a fan driven by a turbine provides extra air to the burner and gives extra thrust

Other synonyms of turbojet include fan-jet, fanjet, fanjet engine, turbofan, turbojet engine.

turbojet (noun)	turbofan engine (noun)
a jet engine in which a fan driven by a turbine provides extra air to the burner and gives extra thrust	a jet engine in which a fan driven by a turbine provides extra air to the burner and gives extra thrust
an airplane propelled by a fanjet engine