Synonyms for Turtleneck (same or very similar meaning)
WordNet sense 1 (a sweater or jersey with a high close-fitting collar):
polo-neckWordNet sense 2 (having a high tubular collar fitting closely around the neck):
turtleneckedWordNet sense 3 (having a neck or having a neck especially as specified (often used in combination)):
neckedFrom the ODE community, based on WordNetadd/edit