turtleneck vs turtle

turtleneck and turtle both are nouns.

Word	Noun	Adjective	Verb	Adverb
turtleneck	Yes	No	No	No
turtle	Yes	No	Yes	No

As nouns, turtleneck and turtle are synonyms defined as:

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

Other synonyms of turtleneck include polo-neck.

turtleneck (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

turtleneck (verb)	turtle (verb)
	hunt for turtles, especially as an occupation
	overturn accidentally