Synonyms of rock ribbed

Adjective

1. rock-ribbed, rockbound, rough (vs. smooth), unsmooth

usage: abounding in or bordered by rocky cliffs or scarps; "the rock-ribbed coast of Maine"

2. die-hard(prenominal), rock-ribbed, inflexible (vs. flexible)

usage: tradition-bound and obstinately opinionated; "an inflexible (or die-hard) conservative"; "rock-ribbed republican"