Dictionary.com
Thesaurus.com

cumulative vs. accumulative

[kyoo-myuh-luh-tiv, -ley-tiv] / ˈkyu myə lə tɪv, -ˌleɪ tɪv /

adjective

  1. increasing or growing by accumulation or successive additions.

    the cumulative effect of one rejection after another.

  2. formed by or resulting from accumulation or the addition of successive parts or elements.

  3. of or relating to interest or dividends that, if not paid when due, become a prior claim for payment in the future.

    cumulative preferred stocks.

[uh-kyoo-myuh-ley-tiv, -luh-tiv] / əˈkyu myəˌleɪ tɪv, -lə tɪv /

adjective

  1. tending to accumulate or arising from accumulation; cumulative.

  2. tending to accumulate wealth; acquisitive.