octuple

/AA0 K T AH1 P AH0 L/
noun
  1. 1

    An eightfold amount or number

verb
  1. 1

    To increase eightfold.

  2. 2

    To increase or multiply something by eight.

adjective
  1. 1

    Eightfold

Source: https://en.wiktionary.org/wiki/octuple