turbofan engine vs turbojet

turbofan engine and turbojet both are nouns.

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

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

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

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

turbofan engine (noun)	turbojet (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