concavity

a sunken area forming a separate space water collected in a shallow concavity on the floor of the cave Synonyms cavity, hole, dent, depression, dint, hollow, indentation, indenture, pit, recessRelated Words burrow, cave, cavern, ditch, excavation, furrow, groove, gutter, trench, trough; basin, bowl, valley; alcove, cleft, niche, nook, opening, recess, socket; alveolus, dimple, gouge, impression, imprint, notch, pocket; borehole, chuckhole, crater, posthole, pothole, sinkhole, wallow, water hole, well; abyss, chasm, gulf, vacuity, vacuum, voidNear Antonyms hill, mound, rise; bump, bunch, hump, lump, pimple, swell, swelling, tumorAntonyms bulge, camber, convexity, jut, projection, protrusion, protuberance