The term 'TREE LINE' can be broken down into two crossword solutions: ANTS (4 letters) and ANCESTRY (8 letters). ANTS is a common term for a type of insect that lives in colonies and is known for its hardworking nature. ANCESTRY is a term used to describe the lineage of a person, often traced back through their family tree. Together, these two terms can be used to describe the relationship between a person and their ancestors, with the tree LINE representing the connection between them.