mock polo neck vs mock polo neck collar

mock polo neck and mock polo neck collar both are nouns.

Word	Noun	Adjective	Verb	Adverb
mock polo neck	Yes	No	No	No
mock polo neck collar	Yes	No	No	No

mock polo neck (noun)	mock polo neck collar (noun)
A sweater with a short turtleneck collar that does not fold down.	A collar that resembles the polo neck with the soft fold at its top and the way it stands up around the neck, but both ends of the tube forming the collar are sewn to the neckline.