Decline is defined as to refuse something, slope downward, become less or to sink from view.
(Law) To put an end to:
To become more distant, and hence indistinct
Die is defined as to stop living, existing or fade away.
Find another word for die-down. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for die-down, like: subside, decrease, decline, abate, recede, die and die-back.