An antisocial sort is someone who is not very sociable and prefers to be alone. The term can be broken down into three crossword solutions: NERD (4 letters), LONER (5 letters), and LONERS (6 letters). A NERD is someone who is highly intelligent and often socially awkward, while a LONER is someone who prefers to be alone and avoids social interaction. LONERS is the plural form of LONER, indicating more than one person who fits this description.