the process of expanding or being expanded; an enlargement

growth

the act of extending or being extended; an additional part

enlargement, continuation

(an instance of) using exaggerated statement(s) made for effect and not to be taken literally as in 'waves as high as Everest'

exaggeration

the size, quantity, degree, mass etc found by a standard or unit; an instrument or device used to find size, quantity etc

portion, scope

(an example of) the process of multiplying or being multiplied

duplication