Similar words
brote
brote and estallido are close synonyms for "outbreak"; brote also separately means "sprout," botanical.
Similar in other languages
Portuguese
surto
surto is the Portuguese word for the same thing — both mean "outbreak."
Practice
1 What does estallido mean?
outbreak
2 Fill the gap: Hubo un ___ de violencia.
Full sentence: Hubo un estallido de violencia. (There was an outbreak of violence.)
3 Which fingerprint chart matches estallido?
estallido: neutral register, academic frequency, general domain, neutral connotation.