turbojet vs jet-propelled plane

turbojet and jet-propelled plane both are nouns.

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

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

Other hypernyms of turbojet include jet, jet plane.

turbojet (noun)	jet-propelled 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