Synonyms for Lifeless:

adj.

arid (adjective)
tedious, dull, dry, uninspired, unanimated, dreary, boring.
blank (adjective)
immobile.
bloodless (adjective)
languid, lazy, slow, spiritless, indolent.
boring (adjective)
humdrum, stodgy, unexciting, uninteresting, arid.
dead (adjective)
inert, gone, late, unresponsive, Reposing, lost, at rest, deceased, at peace.
deceased (adjective)
lost.
depressed (adjective)
spiritless.
dull (adjective)
earthbound.
inactive (adjective)
unmoving, jobless, sleepy, idle, inactive, Snail-paced, unworking, still, lethargic, unemployed, sedentary, stationary, motionless, dormant.
inert (adjective)
immobile, stagnant, passive, vegetative, motionless, catatonic, listless, inactive, inanimate, still, stationary, dormant, inert, lethargic, sedentary, comatose, sluggish, languorous, Reposing, apathetic, languid, static, idle, insensible, paralytic.
insensitive (adjective)
dull.
lethargic (adjective)
indolent, phlegmatic, apathetic, languorous, leaden, dull, unhurried, tired, lethargic, insensible, lackadaisical, benumbed, slothful, slow, listless, sluggish, leisurely, lazy, drooping, dopey, torpid, languid, lumpish, drugged.
lifeless (adjective)
defunct, departed, colorless, extinct, inanimate, static, flat, lusterless, bare, insensible, passive, inorganic, lackluster, empty, sterile, asleep, comatose, slothful, torpid, sluggish, exanimate, drab, listless, lethargic, dead, prosaic, inert, deceased, late.
motionless (adjective)
at rest.
non-living (adjective)
deceased, inorganic, non-living, inanimate, dead.
unimaginative (adjective)
prosaic.

n.

departed, boring, uninteresting, mind-numbing, humdrum, dreary, trivial, unexciting, tedious. deserted, bare, wild, sun-baked, heavy, dusty, parched, treeless, lackluster. dry, drab, spiritless, stodgy, pedestrian, sterile, lusterless, unimaginative, prosaic, colorless, excite, matter of fact, flat, uninspired, aseptic, flavorless, arid, earthbound. lifeless (noun)
empty, exanimate, dead, unanimated.

Other synonyms:

dusty, parched, treeless, sun-baked, aseptic. departed, defunct, uninspired, matter of fact, earthbound, deserted, pedestrian, stodgy, extinct. prosaic, lusterless, lackluster, unimaginative, spiritless, flavorless, colorless. bare, asleep, drab. gone, arid, wild. flat. late. sterile. dry. Other relevant words:
drab, lost, uninteresting, colorless, treeless, humdrum, boring, parched, tedious, excite, heavy, defunct, unresponsive, departed, aseptic, trivial, lackluster, sun-baked, late, extinct, gone, prosaic, at rest, deserted, flavorless, asleep, flat, pedestrian, unimaginative, exanimate, dreary, dry, unanimated, empty, mind-numbing, matter of fact, bare, spiritless, arid, dusty, lusterless, stodgy, wild, earthbound, unexciting, uninspired, sterile.

Usage examples for lifeless

  1. All afternoon the house was lifeless – The Desert of Wheat by Zane Grey
  2. They shut themselves up there all alone, and remained together for hours without the faintest sound coming from the seemingly lifeless chamber. – Paris From the "Three Cities" by Emile Zola
  3. Halbert gradually revived; and listening to him, cast a wistful look on the lifeless Marion. – The Scottish Chiefs by Jane Porter