solid

I (compact) adjective bunched, close, coagulated, compressed, concentrated, condensed, congealed, consolidated, dense, firm, grumose, hard, hardened, impenetrable, impermeable, incompressible, indiscerptible, indivisible, inflexible, insecable, inseparable, massed, massive, monolithical, nonporous, ossified, packed, packed together, pressed together, rigid, serried, solidified, stiff, thick, tight, undissolved, united, unyielding II (sound) adjective able to pay, assured, considered, convincing, dependable, durable, enduring, established, faithworthy, fast, firm, firmus, guaranteed, incontestable, incontrovertible, irrefutable, judicious, just, lasting, logical, politic, precautional, precautionary, precautious, prudent, prudential, rational, reasonable, reliable, responsible, rugged, safe, sagacious, sage, sapient, secure, sensible, solidus, solvent, stabilis, stable, stanch, steadfast, steady, strong, sturdy, substantial, substantive, true, trustworthy, trusty, unconfutable, unerring, unfailing, unimpeachable, unquestionable, unrefutable, valid, weighty, well-built, well-constructed, well-established, well-founded, well-grounded, well-made, wise III index authentic, axiomatic, bodily, cogent, cohesive (compact), compact (dense), compound, concrete, corporeal, dependable, firm, fixed (securely placed), indomitable, inflexible, infrangible, intact, material (physical), meritorious, ossified, secure (sound), sound, stable, staunch, strong, substantive, tangible, unyielding, valid, well-grounded, whole (undamaged)