epicyclic train vs epicyclic gear train

epicyclic train and epicyclic gear train both are nouns.

Word	Noun	Adjective	Verb	Adverb
epicyclic train	Yes	No	No	No
epicyclic gear train	Yes	No	No	No

As nouns, epicyclic train and epicyclic gear train are synonyms defined as:

epicyclic train and epicyclic gear train: a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis

epicyclic train (noun)	epicyclic gear train (noun)
a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis	a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis