The term 'increase in value' can be described by three crossword solutions: APPRECIATE (10 letters), Goup (4 letters), and RISE (4 letters). APPRECIATE means to increase in value or worth, usually over time. Goup is an informal term meaning to increase in number or size. RISE is a verb meaning to move upwards or to increase in amount or level. All three words refer to the concept of increasing in value, either financially, numerically, or physically.