Answer: solid

AnswerCrossword Clue
SOLID... as a rock
SOLIDWell-constructed
SOLIDUnbroken
SOLIDBall below the nine
SOLIDLike some chocolate bunnies
SOLIDThree-dimensional shape
SOLIDCube or sphere, e.g.
SOLIDTried-and-true
SOLIDA state of matter
SOLIDPure, as gold
SOLIDOne of the four states of matter
SOLIDSturdy
SOLIDPool ball type
SOLIDSturdily built
SOLIDNot flimsy
SOLIDPhase in which particle motion is at its slowest
SOLIDReminiscent of the Rock of Gibraltar
SOLIDNot striped, as a pool ball
SOLIDGeometric figure
SOLIDHard
solidsubstantial
SOLIDCone, for one
SOLIDDependable
SOLIDUninterrupted
SOLIDLike a cube
SOLIDThree-dimensional
SOLIDFirm
SOLIDNot hollow
SOLIDCube, for one
SOLIDHardly flimsy
SOLIDKind of geometry
SOLIDIrrefutable
SOLIDReliable
SOLIDLike a good alibi
SOLIDWell-grounded
SOLIDCube or sphere
SOLIDNot liquid or gas
SOLIDReliable, as a citizen
SOLIDLike a rock
SOLIDWell-built