Synonyms of solid

1 Syllable

set, hard, firm, stiff, straight, sound, real, block, firms, goer, strong, lump, hulk, goest, fat, hunk, rock, tough, thick, tight

2 Syllables

stiffest, hardier, firmest, solvent, come-through, big-deal, blockish, steadiest, steadier, stably, dense, husky, straightest, firmer, stable, toughest, ripping, sturdy, fined, lithic, close, steady, trustier, tightest, well-made, stocky, fattest, handfuls, thickset, thicker, stiffer, precast, gloppy, stoner, puissant, unbent, tactual, lumping, compact, cogent, strongest, brass-bound, rooted, petrous, deeping, creakier, straighter, lumped, telling, finer, realer, valid, harder, fatter, skintight, densest, sounder, rocky, fixed, fining, massed, superb, hulking, rockier, denser, firmly, soundest, creaky, hardest, jellied, heavy, realest, hefty, sited, blocky, stalwart, tougher, stablest, thickest, rigid, learned, brassbound, stockier, pebbly, brick-wall, rockbound, hardiest, stabler, blockier, stronger, hardy, buckram, rotund, tighter

3 Syllables

credible, trustable, durably, true-hearted, unfailing, appressed, careful, physical, substantial, undecayed, reliable, practical, heavyset, convincing, uncurled, unsupple, fine-grained, nonporous, shatterproof, polymath, compacting, secure, stabile, pansophic, concrete, rocklike, close-knit, tenacious, material, vitrified, gilt-edged, incorrupt, truehearted, tangible, massive, hard-bitten, tactile, consensual, unyielding, compacted, hard-handed, unbroken, bouldered, rock-ribbed, well-founded, rock-solid, collinear

4 Syllables

suasive, unshakable, high-principled, unshakeably, homogeneous, professorial, determined, philosophic, well-constructed, undivided, unbreakable, immovable, admirable, undistracted, unanimous, jelly-belly, whalelike, rectilineal, close-grained, incarnated, infrangible, nonbreakable, veridical, monolithic, tumescence, impregnable, close-fitting, unforgetful, unmovable, concentrated, unwavering, accurate, problem-solving, heavy-duty, jellybelly, stonelike, lapidarian, remarkable

5 Syllables

satisfactory, unpermissive, well-educated, incompressible, conglomerated, ultraprecise, impenetrable, analytical, environmental, consolidated, unmutilated