Vättern •adjourn, astern, Berne, burn, churn, concern, discern, earn, fern, fohn, kern, learn, Lucerne, quern, Sauternes, spurn, stern, Sterne, tern, terne, Traherne, turn, urn, Verne, yearn •Bayern • Blackburn • heartburn •Hepburn • Raeburn • Swinburne •Gisborne, Lisburn •sideburn • sunburn • Bannockburn •lady-fern • Vättern • extern •cittern, gittern •Comintern • taciturn •nocturn, nocturne •U-turn • upturn

Vättern (vĕ´tərn), lake, 733 sq mi (1,898 sq km), c.80 mi (130 km) long and up to 20 mi (32 km) wide, S central Sweden, drained by the Motala Ström E into the Baltic Sea. It is the second largest lake in Sweden. The Göta Canal crosses the northern part of the deep lake. Visingsö (c.10 sq mi/25 sq km) is the largest island in the Vättern; a prehistoric burial mound is there. Motala and Jönköping are the principal cities on the lake.