stack up

verb4

1. •
   to put into a stack.

   • Stack up the boxes.
2. •
   Often followed by against or among: to compare with (something); to measure up.

   • This is a great outline. Fantastic. If yours doesn't stack up, you won't get a chance to look at it. — 1973
3. •
   to pile up; to accumulate.
4. •
   To put a group of abstract things together.