Lifeless, a.
Destitute of life, or deprived of life; not containing, or inhabited by, living beings or vegetation; dead, or apparently dead; spiritless; powerless; dull; as, a lifeless carcass; lifeless matter; a lifeless desert; a lifeless wine; a lifeless story. -- Life"less*ly, adv. -- Life"less*ness, n.
Syn. -- Dead; soulless; inanimate; torpid; inert; inactive; dull; heavy; unanimated; spiritless; frigid; pointless; vapid; flat; tasteless. -- Lifeless, Dull, Inanimate, Dead. In a moral sense, lifeless denotes a want of vital energy; inanimate, a want of expression as to any feeling that may be possessed; dull implies a torpor of soul which checks all mental activity; dead supposes a destitution of feeling. A person is said to be lifeless who has lost the spirits which he once had; he is said to be inanimate when he is naturally wanting in spirits; one is dull from an original deficiency of mental power; he who is dead to moral sentiment is wholly bereft of the highest attribute of his nature.
Shades of meaning
Fernald lists lifeless only as an antonym, under alive.
He lists it without comment; the entries above explain its neighbors.