Synonyms for Cat Squirrel (same or very similar meaning)
WordNet sense 1 (common reddish-brown squirrel of Europe and parts of Asia):
red squirrel, Sciurus vulgarisWordNet sense 2 (common medium-large squirrel of eastern North America; now introduced into England):
eastern grey squirrel, eastern gray squirrel, Sciurus carolinensisFrom the ODE community, based on WordNetadd/edit