The term 'wake up' can be expressed in a variety of ways, as evidenced by the crossword solutions provided. These include 'ARISE' (5 letters), 'ROUSE' (5 letters), 'ENLIVEN' (7 letters), 'RISE' (4 letters), 'STIR' (4 letters), 'roust' (5 letters), 'AROUSE' (6 letters), 'come to' (6 letters), 'face it' (6 letters), 'see the light' (11 letters), 'snap out of it' (11 letters), 'RISE and shine' (12 letters), and 'come to one's senses' (16 letters). All of these phrases are used to describe the act of waking up, either literally or figuratively.