We don't have synonyms for carbrain yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are harebrain, catbrain and cumbrain.
(n) :
(countable, science fiction) The thinking part of a sentient car.
(n) :
(countable, uncountable) Alternative form of car brain. [(uncountable) A supposed condition suffered by someone who believes in the superiority of cars as a means of transport, at the expense of bicycles and public transit.]
(n) :
(countable, science fiction) The thinking part of a sentient car.
(n) :
(countable, uncountable) Alternative form of car brain. [(uncountable) A supposed condition suffered by someone who believes in the superiority of cars as a means of transport, at the expense of bicycles and public transit.]