S: (v) erupt, irrupt, flare up, flare, break open, burst out (erupt or intensify suddenly) "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism"
S: (v) erupt, belch, extravasate (become active and spew forth lava and rocks) "Vesuvius erupts once in a while"
S: (v) break, burst, erupt (force out or release suddenly and often violently something pent up) "break into tears"; "erupt in anger"
S: (v) erupt (appear on the skin) "A rash erupted on her arms after she had touched the exotic plant"
S: (v) erupt, recrudesce, break out (become raw or open) "He broke out in hives"; "My skin breaks out when I eat strawberries"; "Such boils tend to recrudesce"