Synonyms for Plough (same or very similar meaning)
WordNet sense 1 (a group of seven bright stars in the constellation Ursa Major):
dipper, wagon, wain, Big Dipper, Charles's Wain
WordNet sense 2 (a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing):
plow
WordNet sense 3 (to break and turn over earth especially with a plow):
turn
From the ODE community, based on WordNet
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