Answer: bedrock

AnswerCrossword Clue
BEDROCK

Strong foundation

BEDROCK

Rubble's home

BEDROCK

Firm foundation

BEDROCK
Founding principles
BEDROCK
Solid foundation.
BEDROCKLowest stratum.
BEDROCKNadir
BEDROCKThe Flintstones' home
BEDROCKFlintstones' hometown
BEDROCKSolid ground
BEDROCKFlintstone's city
BEDROCK"The Flintstones" setting
BEDROCK"The Flintstones" town