Thinness is a term used to describe the lack of something, usually referring to a lack of material or physical substance. The crossword solutions for this term are RARITY (6 letters), TENUITY (7 letters), SCARCITY (8 letters), RARENESS (8 letters), and SHORTAGE (8 letters). All of these words refer to the same concept of having little or no abundance of something. RARITY and RARENESS both refer to the infrequency of something, while TENUITY and SCARCITY refer to the small amount of something. SHORTAGE is the most general of the terms, referring to a lack of something in general.