to expand

to extend

expansion

to spread; to proliferate; to diffuse

to extend (a building, an airport runway etc)

to expand

to ramp up capacity

to amplify (sound)

to widen (road)

to increase the number of pages or the size of the pages of a publication

to expand (esp. by new recruitment)

to enlarge (a photo)

expansion card

armament

to extend to

to expand the balance sheet

(Internet slang) to add a friend (on a social network etc)

(of a school) to expand enrollment

to augment

to enlarge color photos

to widen a tube

gaseous diffusion

chest expander (exercise equipment)

expansion card