Similar words
calentura
fiebre is the standard, everyday word for "fever"; calentura is more colloquial or regional, and in some dialects can also refer to a cold sore.
Similar in other languages
French
fièvre
fièvre is the French word for the same thing — both mean "fever."
Portuguese
febre
febre is the Portuguese word for the same thing — both mean "fever."
Practice
1 What does fiebre mean?
fever
2 Fill the gap: El niño tiene ___.
Full sentence: El niño tiene fiebre. (The child has a fever.)
3 Which fingerprint chart matches fiebre?
fiebre: neutral register, core frequency, general domain, neutral connotation.