eruption

nouns

the sudden occurrence of a violent discharge of steam and volcanic material

is derived from

symptom consisting of a breaking out and becoming visible

eruption

is a type of (narrower)

(medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

(of volcanos) pouring out fumes or lava (or a deposit so formed)

is derived from

a sudden violent spontaneous occurrence (usually of some undesirable condition)

"the outbreak of hostilities"

eruption, irruption, outbreak

is derived from

a sudden very loud noise

bam, bang, blast, clap, eruption

the emergence of a tooth as it breaks through the gum

eruption

is derived from

is a type of (narrower)

the becoming visible

"not a day's difference between the emergence of the andrenas and the opening of the willow catkins"