Webster's 1828 Dictionary
DECAYING
ppr. Failing; declining; passing from a good, prosperous or sound state, to a worse condition; perishing.
DECAYING
n.Decay; decline.
American Oxford Thesaurus
decaying
decaying adjective 1 decaying fish: decomposing, decomposed, rotting, rotten, putrescent, putrid, bad, off, perished; moldy, festering, fetid, rancid, rank; maggoty, wormy. 2 a decaying city: declining, degenerating, dying, crumbling, disintegrating; derelict, run-down, tumbledown, ramshackle, shabby, decrepit; in decline, in ruins, on the way out. WORD TOOLKIT See derelict . Word Toolkits illustrate the difference between close synonyms by means of words typically used with them.
Oxford Thesaurus
decaying
decaying adjective 1 the decaying bodies of fish filled the pond: decomposing, decomposed, rotting, rotten, putrescent, putrid, bad, off, spoiled, spoilt, perished; mouldy, mouldering, festering, fetid, stinking, smelly, rancid, rank; maggoty, worm-eaten, wormy, flyblown. 2 Liverpool was a visibly decaying city: declining, degenerating, dying, waning, crumbling, collapsing; run down, broken-down, tumbledown, ramshackle, shabby, battered, decrepit; in decline, on the decline, in ruins, in (a state of ) disrepair, falling apart, falling to pieces; informal on its last legs, on the way out. WORD TOOLKIT decaying See derelict . Word Toolkits illustrate the difference between close synonyms by means of words typically used with them.