Nouns

(n)volcanic eruption, eruptionthe sudden occurrence of a violent discharge of steam and volcanic material
(n)eruptionsymptom consisting of a breaking out and becoming visible
(n)eruption, eructation, extravasation(of volcanoes) pouring out fumes or lava (or a deposit so formed)
(n)outbreak, eruption, irruptiona sudden violent spontaneous occurrence (usually of some undesirable condition)“the outbreak of hostilities”
(n)bang, clap, eruption, blast, bama sudden very loud noise
(n)eruptionthe emergence of a tooth as it breaks through the gum