The term 'FULL-SIZE' can be described by two crossword solutions: BIG (3 letters) and ADULT (5 letters). The term 'FULL-SIZE' is often used to describe something that is large in size, usually referring to an object or person. In this case, the term 'BIG' is used to describe something that is larger than average, while the term 'ADULT' is used to describe someone who is grown up and mature. Therefore, the term 'FULL-SIZE' can be used to describe something or someone that is both large and mature.