exigency (n.)

• climacteric
• clutch
• compulsion
• constraint
• contingency
• crisis
• crossroads
• crunch
• drive
• emergency
• extremity
• hinge
• immediacy
• imperative
• imperativeness
• importunity
• impulse
• impulsion
• insistence
• pass
• persistence
• pertinacity
• pinch
• predicament
• press
• pressure
• push
• rub
• strait
• stress
• tension
• turn
• turning
• urge
• urgency