twinjet vs jet-propelled plane

twinjet and jet-propelled plane both are nouns.

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

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

Other hypernyms of twinjet include jet, jet plane.

twinjet (noun)	jet-propelled plane (noun)
a jet plane propelled by two jet engines	an airplane powered by one or more jet engines