Synonyms for Decreases:

n.

•losses (noun)
ruins, dispossessions, forfeitures, erosions, privations, Penalties, expropriations, losses, divestitures, setbacks, depletions, deprivations.
•subtractions (noun)
elisions, abridgements, deletions, subtractions, curtailments, reductions, deductions.

v.

•curtails (verb)
fragments, minimizes, reduces, discontinues.
•decreases (verb)
compresses, deflates, curtails, abates, truncates, shrinks, deducts, lessens, abridges, compacts, depletes, diminishes, abbreviates, subsides, recedes, concentrates, dies down, erodes, shortens, lowers, dwindles, drains, decrements, contracts.
•depresses (verb)
depresses, sinks, attenuates, debases.
•diminishes (verb)
crops, lightens, Culls, condenses, tapers, shears, bobs, pares, nips, weeds, prunes, Clips, downgrades, shaves, trims.
•loses (verb)
divests, loses, debits, exhausts, dispossesses, misplaces, drops, forfeits, dissolves, dissipates.
•subtracts (verb)
docks, discounts, depreciates, subtracts, deletes, elides, cuts.