simplex machine vs fly frame

simplex machine and fly frame both are nouns.

Word	Noun	Adjective	Verb	Adverb
simplex machine	Yes	No	No	No
fly frame	Yes	No	No	No

As nouns, simplex machine and fly frame are synonyms defined as:

simplex machine and fly frame: a textile machine that transforms the drawn sliver into roving.

Other synonyms of simplex machine include roving frame, speed frame.

simplex machine (noun)	fly frame (noun)
a textile machine that transforms the drawn sliver into roving.	a textile machine that transforms the drawn sliver into roving.