on solid ground
- stableSecure and unchanging
- secureProtected from harm
- groundedStable and realistic
- footingSecure ground position
- foundationUnderlying support structure
terra firma · steady · anchored · rooted · balanced · firm · earthbound · standing · bedrock · certainty · reliable · planted · landing · safe · concrete · unwavering · foothold · touchdown
physical stability
on solid groundon shaky ground
adrift · on thin ice · treading water · sinking · at sea
metaphorical security/confidence
on solid groundon shaky ground
on thin ice · out of one's depth · in over one's head · at sea · vulnerable
evidential basis
on solid groundon shaky ground
baseless · unfounded · groundless · unsubstantiated · built on sand