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adjective
hard, dimensional
Synonyms: brick wall, close, compact, compacted, concentrated, concrete, consolidated, dense, firm, fixed, heavy, hefty, hulk, hunk, husky, massed, material, physical, rock, rocklike, rooted, secure, set, sound, stable, strong, sturdy, substantial, thick, tight, unshakable
Antonyms: fluid, gaseous, insubstantial, liquid, soft, vaporous
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adjective
continuous, complete
Synonyms: agreed, brick wall, consecutive, consentient, continued, firm, like a rock, regular, set in stone, stable, steady, unalloyed, unanimous, unbroken, undivided, uninterrupted, united, unmixed
Antonyms: broken, divided, incomplete, incontinuous, intermittent
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adjective
dependable, reliable
Synonyms: cogent, constant, decent, estimable, genuine, good, law-abiding, levelheaded, pure, real, satisfactory, satisfying, sensible, serious, sober, sound, stalwart, steadfast, trustworthy, trusty, upright, upstanding, valid, worthy
Antonyms: tenuous, undependable, unreliable, untrustworthy, vulnerable