driveshaft vs rotating shaft

driveshaft and rotating shaft both are nouns.

Word	Noun	Adjective	Verb	Adverb
driveshaft	Yes	No	No	No
rotating shaft	Yes	No	No	No

As nouns, rotating shaft is a hypernym of driveshaft; that is, rotating shaft is a word with a broader meaning than driveshaft:

driveshaft: a rotating shaft that transmits power from the engine to the point of application
rotating shaft: a revolving rod that transmits power or motion

Other hypernyms of driveshaft include shaft.

driveshaft (noun)	rotating shaft (noun)
a rotating shaft that transmits power from the engine to the point of application	a revolving rod that transmits power or motion