ramjet vs flying drainpipe

ramjet and flying drainpipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
ramjet	Yes	No	No	No
flying drainpipe	Yes	No	No	No

As nouns, ramjet and flying drainpipe are synonyms defined as:

ramjet and flying drainpipe: a simple type of jet engine; must be launched at high speed

Other synonyms of ramjet include atherodyde, athodyd, ramjet engine.

ramjet (noun)	flying drainpipe (noun)
a simple type of jet engine; must be launched at high speed	a simple type of jet engine; must be launched at high speed