turbofan engine vs turbofan

turbofan engine and turbofan both are nouns.

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

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

turbofan engine and turbofan: 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, turbojet, turbojet engine.

turbofan engine (noun)	turbofan (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