turboprop vs propjet

turboprop and propjet both are nouns.

Word	Noun	Adjective	Verb	Adverb
turboprop	Yes	No	No	No
propjet	Yes	No	No	No

As nouns, turboprop and propjet are synonyms defined as:

turboprop and propjet: an airplane with an external propeller that is driven by a turbojet engine

Other synonyms of turboprop include turbo-propeller plane.

turboprop (noun)	propjet (noun)
an airplane with an external propeller that is driven by a turbojet engine	an airplane with an external propeller that is driven by a turbojet engine