About CUMUL: The root “CUMUL” used in many English words came from Latin word “CUMULUS” which means “Heap”. The other possible meaning subsets are “Gathering”, “Accumulation”, and “Mass” etc.
Words:
Accumulate (verb) - Gather together or acquire an increasing number or quantity of.
Accumulation (noun) - The acquisition or gradual gathering of something.
Accumulative (adjective) - Gathering or growing by gradual increases.
Accumulator (noun) - A person or thing that accumulates something.
Cumulative (adjective) - Increasing or increased in quantity, degree, or force by successive additions.
Cumulate (verb) - Gather together and combine.
Cumulous (noun) - Cloud forming rounded masses heaped on each other above a flat base at fairly low altitude.
Bioaccumulation (noun) - Accumulation of substances, such as pesticides, or other chemicals in an organism. Bioaccumulation occurs when an organism absorbs a - possibly toxic - substance at a rate faster than that at which the substance is lost by catabolism and excretion.