as in to accumulate
to gradually form into a layer, pile, or mass
those newspapers have been stacking up in the basement since we moved here
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Example Sentences
Recent Examples of Synonyms for stack (up)
Verb
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The military held a similar security strip from 1985 until 2000, before withdrawing after years of steady casualties, a toll that is accumulating once again.
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Rainwater tends to accumulate at the road edges.
Verb
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As the finalists from each state move on to the 'Best Pet in Nation' round of the Pet Lovers' Choice Awards, the team at USA TODAY Pets has gathered all the finalists, runner-ups and third place pets from each region.
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Hundreds of people have gathered throughout the week to carry posters, shout slogans, and sing.
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“Stack (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/stack%20%28up%29. Accessed 29 Jun. 2026.
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