The term Gull's Kin can be broken down into two crossword solutions: TERN (4 letters) and TERNS (5 letters). TERN is a type of seabird that belongs to the family Laridae, which includes gulls, terns, skimmers, and more. TERNS are the plural form of TERN, and they are known for their long, pointed wings and forked tails. They are often seen in large flocks near coastal areas, and they feed on small fish and invertebrates.