i Register
In some senses, confab is marked as informal. Watch for register when choosing this word.
noun
Clipping of confabulation (“a casual chat or talk”).
But, Sir, as I am in haſte, we had better refer the Diſpute at preſent—any other Time I am at your Service for a Confab of a few Hours—I ſhall run thro' my Buſineſs with as brief Prolixity as poſſible— [...]
[January 4, 1810.] [...] At six to la Baronne Knebel, chez lui Princess Caroline. Tea and cheerful confab.
verb
Clipping of confabulate (“to speak casually with somebody; to chat”).
[T]o mak conquests o' bits o' lasses, ye would hae been sitting in your forlorn chair, confabbing wi' Jock, about whether by rope, or gun, was the easiest way o' deeing.
He had actually argued and "confabbed" with a strange jeweller, and he had asked him questions about his wife; his delicate little Hélène!