The crossword solutions for the term STIFF PAPER; ODD PERSON are CARD and ECCENTRIC respectively. CARD is a type of stiff paper that is used for making cards, postcards, business cards, and other items. It is usually thicker than regular paper and has a smooth finish. ECCENTRIC is an adjective used to describe someone who behaves in an unusual or unconventional way. It is often used to describe people who have an odd personality or behavior.