[verb] start abruptly; "After 1989, peace broke out in the former East Bloc" Synonyms:break out
[verb] erupt or intensify suddenly; "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism" Synonyms:irrupt, flare up, flare, break open, burst out
[verb] start to burn or burst into flames; "Marsh gases ignited suddenly"; "The oily rags combusted spontaneously" Synonyms:ignite, catch fire, take fire, combust, conflagrate
[verb] become active and spew forth lava and rocks; "Vesuvius erupts once in a while" Synonyms:belch, extravasate
[verb] force out or release suddenly and often violently something pent up; "break into tears"; "erupt in anger" Synonyms:break, burst
[verb] appear on the skin; "A rash erupted on her arms after she had touched the exotic plant"
[verb] become raw or open; "He broke out in hives"; "My skin breaks out when I eat strawberries"; "Such boils tend to recrudesce" Synonyms:recrudesce, break out