The term 'builds up' can be represented by four different crossword solutions: HYPES (5 letters), AMASSES (7 letters), ACCRUES (7 letters), and ERECTS (6 letters). HYPES means to promote or publicize something in an exaggerated way, often to create excitement. AMASSES means to accumulate or gather a large amount of something. ACCRUES means to accumulate or increase gradually over time. Lastly, ERECTS means to construct or build something. All of these words refer to the idea of building up, whether it is through gathering, constructing, or promoting.