List of waning synonyms and waning related words.
aging, at rest, calm, cloistered, coming apart, contractive, cool, cracking, crumbling, decadent, declining, decreasing, decrescendo, decrescent, degenerate, deliquescent, deteriorating, diminishing, diminuendo, disintegrating, doting, draining, drooping, dwindling, dying, ebbing, effete, even-tenored, fading, failing, falling, flagging, fragmenting, getting on, going to pieces, growing old, halcyon, hushed, impassive, isolated, languishing, lessening, marcescent, moldering, on the wane, pacific, peaceable, peaceful, pining, placid, quiescent, quiet, receding, reductive, regressive, reposeful, reposing, restful, resting, retiring, retreating, retrograde, retrogressive, secluded, senescent, sequestered, sequestrated, sheltered, shrinking, shriveling, sinking, sliding, slipping, slumping, smooth, still, still as death, stillish, stilly, stoic, stolid, subsiding, tabetic, tranquil, unagitated, undisturbed, unmoved, unperturbed, unruffled, unstirring, untroubled, wasting, wilting, withering, worsening