piece of ground vs picnic area

Other hyponyms of piece of ground include baseball diamond, diamond, infield, center, center field, centerfield, centre, left, left field, leftfield, outfield, right, right field, rightfield, short, railway yard, railyard, yard, desert, oasis, battlefield, battleground, field, field of battle, field of honor, minefield, breeding ground, clearing, glade, field, field of fire, grounds, athletic field, field, playing area, playing field, industrial park, grassland, mud flat, parade ground, fairground, midway, fairway, park, parkland, common, commons, green, park, picnic ground, public square, square, toll plaza, range, sector, land site, site, subdivision, mine field, terrain, patch, plot, plot of ground, plot of land, lot, yard, yard.