The term 'Lose One's Lap' is a phrase that refers to the act of standing up from a seated position. The crossword solutions for this term are STANDUP (7 letters), RISE (4 letters), and STAND (5 letters). STANDUP is an action verb that means to RISE to a standing position, while RISE is a verb that means to move upwards or increase in level. STAND is a verb that means to remain in an upright position. All three words refer to the same action of standing up from a seated position.