mushrooming

/M AH1 SH R UH0 M IH0 NG/
verb
  1. 1

    To grow quickly to a large size.

    โ€œThe townโ€™s population mushroomed from 10,000 to 110,000 in five years.โ€

  2. 2

    To gather mushrooms.

    โ€œWe used to go mushrooming in the forest every weekend.โ€

  3. 3

    To form the shape of a mushroom.

noun
  1. 1

    The act of gathering mushrooms.

  2. 2

    Rapid or explosive growth.

  3. 3

    The formation of a mushroom-like shape.

Source: https://en.wiktionary.org/wiki/mushroom, https://en.wiktionary.org/wiki/mushrooming