trackless trolley vs trolley coach

trackless trolley and trolley coach both are nouns.

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

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

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

Other synonyms of trackless trolley include trolleybus.

trackless trolley (noun)	trolley coach (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