| Main Entry: | |
| Part of Speech: | noun |
| Definition: | empty or dented area |
| Synonyms: | basin, bottom, bowl, cave, cavern, cavity, chamber, channel, cleft, concavity, crater, cup, dale, den, depression, dimple, dip, dish, excavation, groove, gulf, hole, indentation, notch, pit, pocket, sag, scoop, sinkage, sinkhole, socket, trough, vacuity, valley, void |
| Antonyms: | solid |
| Main Entry: | basin |
| Part of Speech: | noun |
| Definition: | container or area where water is held |
| Synonyms: | bay, bowl, concavity, depression, dip, ewer, gulf, hole, hollow, lagoon, pan, pool, pot, sag, sink, sinkage, sinkhole, tub, valley, vessel, washbasin, washbowl, watershed |
| Main Entry: | blank |
| Part of Speech: | noun |
| Definition: | empty space |
| Synonyms: | abyss, cavity, chasm, emptiness, gap, gulf, hiatus, hole, hollow, hollowness, interstice, interval, lacuna, nihility, nothingness, nullity, omission, opening, preterition, pretermission, skip, tabula rasa, vacancy, vacuity, vacuum, void, womb |
| Main Entry: | cave |
| Part of Speech: | noun |
| Definition: | hole in land formation |
| Synonyms: | cavern, cavity, den, grotto, hollow, pothole, rock shelter, subterrane, subterranean area |
| Notes: | cavern is more vague and rhetorical than cave; a cavern is a large cave |
| Main Entry: | cavity |
| Part of Speech: | noun |
| Definition: | sunken or decayed area |
| Synonyms: | armpit, atrium, basin, bursa, caries, chamber, crater, decay, dent, depression, gap, hole, hollow, pit, pocket, sinus, socket, vacuity, void |
| Main Entry: | chamber |
| Part of Speech: | noun |
| Definition: | small compartment, room |
| Synonyms: | alcove, antechamber, apartment, bedchamber, bedroom, box, case, cavity, cell, chest, container, cubicle, enclosure, flat, hall, hollow, lodging, pocket, room, socket |
| Main Entry: | chasm |
| Part of Speech: | noun |
| Definition: | gap, abyss |
| Synonyms: | abysm, alienation, arroyo, blank, breach, cavity, cleavage, cleft, clough, clove, crater, crevasse, fissure, flume, gorge, gulch, gulf, hiatus, hole, hollow, omission, opening, oversight, preterition, ravine, rent, rift, schism, skip, split, void, yawn |
| Antonyms: | closure, junction, juncture |
| Main Entry: | deepen |
| Part of Speech: | verb |
| Definition: | make depth greater |
| Synonyms: | dig, dig out, dredge, excavate, expand, extend, hollow, scoop out, scrape out |
| Antonyms: | fill |
| Main Entry: | dent |
| Part of Speech: | noun |
| Definition: | depression, scrape, chip |
| Synonyms: | cavity, con-cavity, crater, crenel, cut, dimple, dint, dip, embrasure, furrow, hollow, impression, incision, indentation, nick, notch, pit, scallop, score, scratch, sink, trough |
| Antonyms: | bulge |