Ebola and Viral hemorrhagic fever

Ebola noun - A severe and often fatal disease in humans and nonhuman primates (monkeys and chimpanzees) caused by the Ebola virus; characterized by high fever and severe internal bleeding; can be spread from person to person; is largely limited to Africa.

Viral hemorrhagic fever and Ebola are semantically related. In some cases you can use "Viral hemorrhagic fever" instead a noun "Ebola".

Viral hemorrhagic fever noun - A group of illnesses caused by a viral infection (usually restricted to a specific geographic area); fever and gastrointestinal symptoms are followed by capillary hemorrhage.

Ebola and viral hemorrhagic fever are semantically related. Sometimes you can replace term "Ebola" with "Viral hemorrhagic fever", this terms are similar.