"Under fire" is a common expression used to describe a situation in which an individual is under attack, criticism or scrutiny. However, there are other phrases that can be used as synonyms for this expression. One of them is "in the crosshairs", which typically refers to a situation that is being actively targeted. Another synonym for this expression is "under attack", which is often used to describe situations that are being strongly criticized. Other similar phrases include "under siege", which typically refers to a situation that is being surrounded or blocked, and "in the line of fire", which describes being in the direct path of an attack or challenge. Regardless of the phrase used, all of these expressions imply a high level of pressure and a need for quick action.