Answer: bubble

AnswerCrossword Clue
BUBBLEResult of irrational exuberance
bubbleA brief, sudden, upward change from a general trend
bubbleA thin sphere of liquid enclosing air or another gas
bubbleA place or position of isolated safety
bubbleto form a globule of liquid blown out with gas
bubbleA state or feeling that is unstable and unlikely to last
bubbleAn air- or gas-filled spherical cavity in a liquid or a solidified liquid such as glass or amber
bubbleA marine mollusk that typically has a thin scroll-like shell
bubbleA transparent domed cover or enclosure
BUBBLEWhat soap may create
BUBBLEEconomic boom
BUBBLEChampagne feature
BUBBLEKind of gum
BUBBLEEffervesce.
BUBBLE... and squeak.
BUBBLEBegin to boil
BUBBLEPopping candidate
BUBBLEThin sphere
BUBBLEIllusion
BUBBLE... wrap