speed cop vs motorcycle cop

speed cop and motorcycle cop both are nouns.

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

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

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

Other synonyms of speed cop include motorcycle policeman.

speed cop (noun)	motorcycle 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)