motorcycle cop vs speed cop

motorcycle cop and speed cop both are nouns.

Word	Noun	Adjective	Verb	Adverb
motorcycle cop	Yes	No	No	No
speed cop	Yes	No	No	No

As nouns, motorcycle cop and speed cop are synonyms defined as:

motorcycle cop and speed cop: a policeman who rides a motorcycle (and who checks the speeds of motorists)

Other synonyms of motorcycle cop include motorcycle policeman.

motorcycle cop (noun)	speed cop (noun)
a policeman who rides a motorcycle (and who checks the speeds of motorists)	a policeman who rides a motorcycle (and who checks the speeds of motorists)