Outgrowth can be used to describe developments in projects, ideas, or groups, not just physical growth. The new department was an outgrowth of increased customer service demand.
Pro Tip 2/3
Causal Link
'Outgrowth' implies a direct connection or evolution from its origin. Online shopping is a natural outgrowth of the digital age.
Pro Tip 3/3
Neutral Term
The term 'outgrowth' doesn't imply whether the result is positive or negative. The social movement was an outgrowth of widespread discontent.