ναῦςnaûs, nowce; from νάω náō or νέω néō (to float); a boat (of any size):—ship.
Thayer's Greek Lexicon
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STRONGS G3491:
ναῦς, accusative ναῦν, ἡ (from ναῷ or νεώ, to flow, float, swim), a ship, vessel of considerable size: Acts 27:41. (From Homer down; the Sept. several times for אנִי and אנִיָה.)