Solid Solid synonyms firm solid and firm strong solid and strong substantial solid and substantial hard solid and hard sound solid and sound unanimous solid and unanimous secure solid and secure sturdy solid and sturdy stable solid and stable good solid and good Full list of synonyms (2620) Solid antonyms liquid solid and liquid unreliable solid and unreliable gaseous solid and gaseous hollow solid and hollow soft solid and soft weak solid and weak false solid and false fluid solid and fluid flexible solid and flexible untrustworthy solid and untrustworthy Full list of antonyms (344) Share this picture Share this image Share this picture Share this image