WordNet: decline, diminution

change toward something smaller or lower

• hypernym decrease, decrement

• hyponym declension, decline in quality, deterioration, worsening

• hyponym detumescence

• hyponym ebb, ebbing, wane

• hyponym erosion

• hyponym loss

• hyponym nosedive

• hyponym sinking spell

• hyponym slippage

decline

• (englanti) decline (derivationally related)
• (suomi) lasku (synonyymi)

• (suomi) väheneminen (synonyymi)

diminution

• (englanti) diminish (derivationally related)
• (suomi) pieneneminen (synonyymi)