turbojet vs jet plane

turbojet and jet plane both are nouns.

Word	Noun	Adjective	Verb	Adverb
turbojet	Yes	No	No	No
jet plane	Yes	No	No	No

As nouns, jet plane is a hypernym of turbojet; that is, jet plane is a word with a broader meaning than turbojet:

Other hypernyms of turbojet include jet-propelled plane, jet.

turbojet (noun)	jet plane (noun)
a jet engine in which a fan driven by a turbine provides extra air to the burner and gives extra thrust	an airplane powered by one or more jet engines
an airplane propelled by a fanjet engine