i Register
In some senses, gibber is marked as obsolete, colloquial. Watch for register when choosing this word.
noun
Gibberish, unintelligible speech.
verb
To jabber, talk rapidly and unintelligibly or incoherently.
A little ere the mightiest Julius fell, / The graves stood tenantless and the sheeted dead / Did squeak and gibber in the Roman streets – […]
noun
A stone or rock, of chalcedony or similar mineral, found strewn over arid regions of inland Australia; a gibber stone.
Any small rock or stone, especially one used for throwing.
“Well, all I can say is that if yer don't take yer dial outer the road I'll bloomin' well take an' bounce a gibber off yer crust.”
A large boulder or rocky outcrop; also, an overhanging rock formation.