n.
1.
Unavoidableness, inevitableness.
2.
Compulsion, fatality, fate, destiny, irresistible force, overruling power.
3.
Indispensableness, indispensability, need.
4.
Need, needfulness, urgency, exigency, pressing want.
5.
Requirement, requisite, essential, necessary, indispensable thing, sine qua non .
6.
Indigence, poverty, need, want.