the length, area, range etc (of something)

range, magnitude

the process of growing or developing

development, progress

the act, process, of reproducing; something reproduced, especially a work of art

something duplicated; duplication

to cause (something) to become wider, longer etc by unfolding or unrolling; to put (a substance) on a surface and extend its area by flattening etc

expansion, development; extent

(to cause something) to become wider, longer; a continuous period of time, extent of country etc

expanse