turbofan engine vs fanjet engine

turbofan engine and fanjet engine both are nouns.

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

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

turbofan engine and fanjet 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, turbofan, turbojet, turbojet engine.

turbofan engine (noun)	fanjet 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