Term: essential condition: a prerequisite
Broader: prerequisite: something that is required in advance | Unrelated: anointing of the sick: a Catholic sacrament; a priest anoints a dying person with oil and prays for salvation
Broader: prerequisite: something that is required in advance | Unrelated: shop steward: a union member who is elected to represent fellow workers in negotiating with management
Broader: prerequisite: something that is required in advance | Unrelated: roundsman: a workman employed to make rounds (to deliver goods or make inspections or so on)
Broader: prerequisite: something that is required in advance | Unrelated: good samaritan: a person who voluntarily offers help or sympathy in times of trouble
Broader: prerequisite: something that is required in advance | Unrelated: procrastinator: someone who postpones work (especially out of laziness or habitual carelessness)
Broader: prerequisite: something that is required in advance | Unrelated: domino effect: the consequence of one event setting off a chain of similar events (like a falling domino causing a whole row of upended dominos to fall)
Broader: prerequisite: something that is required in advance | Unrelated: subvention: grant of financial aid as from a government to an educational institution
Broader: prerequisite: something that is required in advance | Unrelated: first class: the highest rank in a classification
Broader: prerequisite: something that is required in advance | Unrelated: grain moth: moth whose larvae feed on grain
Broader: prerequisite: something that is required in advance | Unrelated: molybdenum steel: steel containing 10-15% molybdenum; properties are similar to tungsten steel