Answer: ADDTO
ADDTO is a crossword puzzle answer that we have spotted 34 times.
    - Up
 
    - Supplement
 
    - Build on
 
    - Beef up
 
    - Enlarge, as one's lead
 
    - Increase
 
    -     Build on
 
    - Enlarge
 
    - Heighten
 
    - Enhance
 
    - Expand upon
 
    - Increase by
 
    - Increase, as the pot
 
    - Augment
 
    - Expand, as a collection
 
    - Build an extension on
 
    - Acquire more items for, as a collection
 
    - Buy another item for, as a collection
 
    - Pad
 
    - Increase, as a lead
 
    - Boost
 
    - Append
 
    - Pile on
 
    - Lengthen, as a lead
 
    - Expand, as a building
 
    - Include in, as a recipe
 
    - Complement
 
    - Build upon
 
    - Increase, as one's lead
 
    - Embellish
 
    - Toss in
 
    - Make larger
 
    - Expand
 
    - Increase, as a pot