polo-neck vs turtle

polo-neck and turtle both are nouns.

Word	Noun	Adjective	Verb	Adverb
polo-neck	Yes	No	No	No
turtle	Yes	No	Yes	No

As nouns, polo-neck and turtle are synonyms defined as:

polo-neck and turtle: a sweater or jersey with a high close-fitting collar

Other synonyms of polo-neck include turtleneck.

polo-neck (noun)	turtle (noun)
a sweater or jersey with a high close-fitting collar	any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimming
	a sweater or jersey with a high close-fitting collar

polo-neck (verb)	turtle (verb)
	hunt for turtles, especially as an occupation
	overturn accidentally