extension

[1]	stretching , expansion , increase , enlargement , augmentation , development , amplification , broadening , widening , lengthening , spread , spreading
[2]	range , extensiveness , scope , extent , magnitude , gauge , compass , sweep , reach , size , volume , dimension(s) , proportions , capacity , span , breadth , width , height , length , spread , stretch
[3]	addendum , propagation , addition , annexe , wing , adjunct , ell , appendage , appendix , supplement
[4]	extension service , university extension
[5]	filename extension , file name extension
[6]	reference , denotation
[7]	lengthiness , prolongation
[8]	telephone extension , extension phone
[9]	elongation
[10]	annex , annexe , wing