flying drainpipe vs jet engine

flying drainpipe and jet engine both are nouns.

Word	Noun	Adjective	Verb	Adverb
flying drainpipe	Yes	No	No	No
jet engine	Yes	No	No	No

As nouns, jet engine is a hypernym of flying drainpipe; that is, jet engine is a word with a broader meaning than flying drainpipe:

flying drainpipe: a simple type of jet engine; must be launched at high speed
jet engine: a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion

flying drainpipe (noun)	jet engine (noun)
a simple type of jet engine; must be launched at high speed	a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion