trolley coach vs trackless trolley

trolley coach and trackless trolley both are nouns.

Word	Noun	Adjective	Verb	Adverb
trolley coach	Yes	No	No	No
trackless trolley	Yes	No	No	No

As nouns, trolley coach and trackless trolley are synonyms defined as:

trolley coach and trackless trolley: a passenger bus with an electric motor that draws power from overhead wires

Other synonyms of trolley coach include trolleybus.

trolley coach (noun)	trackless trolley (noun)
a passenger bus with an electric motor that draws power from overhead wires	a passenger bus with an electric motor that draws power from overhead wires