broaden (v.)
- accrue
- accumulate
- advance
- aggrandize
- amplify
- appreciate
- augment
- balloon
- bloat
- boom
- boost
- breed
- build
- bulk
- crescendo
- deepen
- develop
- dilate
- distend
- enlarge
- exalt
- expand
- extend
- fatten
- gain
- generalize
- globalize
- grow
- hike
- huff
- increase
- inflate
- intensify
- lengthen
- magnify
- maximize
- mount
- multiply
- open
- parlay
- proliferate
- puff
- pump
- pyramid
- raise
- rarefy
- rise
- snowball
- spread
- strengthen
- stretch
- sufflate
- swell
- thicken
- tumefy
- universalize
- up
- wax
- widen