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Extensively vs Substantially - What's the difference?

extensively | substantially |

As adverbs the difference between extensively and substantially

is that extensively is in an extensive manner, widely while substantially is in a strong substantial manner; considerably.

extensively

English

Adverb

(en adverb)
  • In an extensive manner, widely.
    • He has read and traveled extensively .
  • To a great extent.
    • He became more extensively involved than he intended.

    substantially

    English

    Adverb

    (en adverb)
  • In a strong substantial manner; considerably.
  • * 2012 October 23, David Leonhardt, "[http://www.nytimes.com/2012/10/24/us/politics/race-for-president-leaves-income-slump-in-shadows.html?_r=1&hp]," New York Times (retrieved 24 October 2012):
    • For the first time since the Great Depression, median family income has fallen substantially over an entire decade. Income grew slowly through most of the last decade, except at the top of the distribution, before falling sharply when the financial crisis began.
  • To a great extent; in essence; essentially.
  • Without material qualifications.