A boost is a term used to describe an increase in something, such as energy, MORALE, or confidence. The crossword solutions for the term A BOOST are DEAD (4 letters), EGO (3 letters), LIFT (4 letters), MORALE (6 letters), and RAISE (5 letters). DEAD can refer to a lack of energy or enthusiasm, while EGO can refer to a person's sense of self-importance. LIFT can refer to a physical act of raising something, and MORALE can refer to a person's emotional state or outlook. Finally, RAISE can refer to an increase in salary or status.