削減【さくげん】
cut, reduction, curtailment
減少【げんしょう】
decrease, reduction, decline
減速【げんそく】
deceleration
増減【ぞうげん】
increase and decrease, fluctuation
半減【はんげん】
reduction by half, halving
加減【かげん】
degree, extent, amount, balance, state, condition, (health) condition, state of health, adjustment, moderation, regulation, addition and subtraction, slight sign of ..., slight state of ..., just right for ...
減る【へる】
to decrease (in size or number), to diminish, to abate
減らす【へらす】
to abate, to decrease, to diminish, to shorten
減点【げんてん】
subtracting points, points deducted
減俸【げんぽう】
salary reduction, salary cut
漸減【ぜんげん】
gradual decrease, decline