- ADDTO
- Increase
- Supplement
- Build up, as a collection
- Augment
- Extend
- Heighten
- Increase, as the pot
- Enhance
- Build on
- Expand upon
- Increase by
- Pile on
- Beef up
- Be a contributor for
- Pitch in on
- Include in, as a recipe
- Put in
- Buy another item for, as a collection
- Acquire more items for, as a collection
- Build an extension on
- Expand, as a collection
- Expand
- Enlarge
- Pad
- Up
- Increase, as a lead
- Increase, as a collection
- Embellish
- Enlarge, as one's lead
- Boost
- Expand, as a building
- Complement
- Make larger
- Toss in
- Increase, as a pot
- Throw in
- Increase, as one's lead
- Build upon
- Append
- Make it bigger
- Pump up
