There are several synonyms for the word "carlish," which generally means rude, surly, or unfriendly. One synonym is "crabbed," which refers to someone who is ill-tempered or difficult to deal with. Another synonym is "boorish," which refers to someone who is coarse or uncivilized. "Unamiable" is another synonym that describes someone who is not friendly or pleasant. "Churlish" is also a synonym, which means someone who is rude or miserly. All of these words can be used interchangeably with "carlish" to describe someone who is unpleasant or unfriendly in their demeanor.