The term 'increase, with 'UP'' can be represented by four different crossword solutions: RAMP (4 letters), REV (3 letters), amp (3 letters), and CRANK (5 letters). RAMP is a noun that refers to an inclined surface connecting two levels, while REV is a verb meaning to increase the speed of an engine. Amp is a noun that refers to a unit of electrical current, and CRANK is a verb meaning to turn something with a circular motion. Finally, STEP is a verb meaning to raise or increase in amount or degree. All of these words are related to the concept of increasing something, with the addition of the word 'UP' to emphasize the idea of increasing something further.