hyperpyrexia

English Thesaurus

1. extremely high fever (especially in children) (noun.state)

hypernym	:	hyperthermia, hyperthermy,
definition	:	abnormally high body temperature; sometimes induced (as in treating some forms of cancer) (noun.state)

hypernym	:	febricity, febrility, fever, feverishness, pyrexia,
definition	:	a rise in the temperature of the body; frequently a symptom of infection (noun.state)