catamount

A wild animal of the family Felidae, especially the cougar, mountain lion or puma (Puma concolor).

Uncle Charley's voice was very soft and there was a weary note in it. "Great snarlin' catamounts, but I'm tired."

'He would have rid that horse, too,' pa says, 'if I hadn't a stopped him. A durn spotted critter wilder than a catty-mount. A deliberate flouting of her and me.'

Synonym of catamountain (“a leopard, a panther (Panthera pardus)”).