locomotive engine vs locomotive

locomotive engine and locomotive both are nouns.

Word	Noun	Adjective	Verb	Adverb
locomotive engine	Yes	No	No	No
locomotive	Yes	Yes	No	No

As nouns, locomotive engine and locomotive are synonyms defined as:

locomotive engine and locomotive: a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks

Other synonyms of locomotive engine include engine, railway locomotive.

locomotive engine (noun)	locomotive (noun)
a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks	a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks

locomotive engine (adjective)	locomotive (adjective)
	of or relating to locomotion