transformation is on the Academic Word List.

Pronunciation change

Noun change

Singular
transformation

Plural
transformations

  1. (countable & uncountable) A transformation is a change in the form or shape, often into something completely different.
    She seems to have undergone a total physical transformation - her hair is cut short and she is over 20kg heavier.
    We look forward to the transformation of the bedroom into a library and office.
    This kind of transformation can only be done by magic.

Related words change