The term CHICKAREE RELATIVE is related to the five-letter word ACORN. Acorns are the fruit of the oak tree, which is a relative of the chickaree, also known as the Douglas squirrel. The Douglas squirrel is a small rodent native to western North America, and is known for its distinctive reddish-brown fur and white belly. Acorns are a major food source for the Douglas squirrel, and other animals such as deer, birds, and bears.