simplex machine vs speed frame

simplex machine and speed frame both are nouns.

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

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

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

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

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