turbofan engine vs turbojet engine

turbofan engine and turbojet engine both are nouns.

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

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

turbofan engine and turbojet 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 turbofan engine include fan-jet, fanjet, fanjet engine, turbofan, turbojet.

turbofan engine (noun)	turbojet 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