| stack up 
 
 arrange into piles or stacks
 - She piled up her books in my living room
 • Syn:
 pile up, heap up
 • Hypernyms:
 gather, garner, collect, pull together
 • Verb Frames:
 - Something ----s
 - Something is ----ing PP
 - Somebody ----s something
 - Somebody ----s something PP
 
 
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