Synonyms for Senseless:

adj.

absurd (adjective)
absurd, anachronistic, bizarre, contradictory, crazy, eccentric, fallacious, farcical, foolish, idiotic, illogical, implausible, impossible, inane, incongruous, inconsistent, invalid, irrational, ludicrous, meaningless, nonsensical, outlandish, paradoxical, preposterous, ridiculous, self-contradictory, silly.
dead (adjective)
anesthetized.
meaningless (adjective)
blathering, cryptic, double talk, gobbledygook, hogwash, jabbering, meaningless, noisy, unmeaning, Driveling, absurd, nonsensical.
numb (adjective)
insensitive.
senseless (adjective)
aloof, anesthetized, callous, comatose, dead, dull, faint, insensible, insensitive, insentient, narcotic, numb, oblivious, soporific, swooning, unconscious, unfeeling, unperceptive, blacked out, trance-like.
silly, meaningless (adjective)
absurd, crazy, double talk, foolish, idiotic, illogical, inane, incongruous, inconsistent, irrational, ludicrous, mindless, nonsensical, pointless, purposeless, ridiculous, unintelligent, unmeaning, unreasonable.
witless (adjective)
witless.

n.

childish, extreme, hysterical, irresponsible, perverse, wrong. asleep, fast asleep, out, purpose, semiconscious, sound asleep, under, out cold, out for the count. ability, brainless, insensate, planned, unintelligent, Weak-minded. awareness, cold. senseless (noun)
insensible, meaningless, mindless, nitwitted, pointless, purposeless, reasonless, soft-witted, unconscious, unreasonable, witless.

Other synonyms:

brainless. unintelligent, Weak-minded. cold. stupid
insensate.
Other relevant words:
asleep, brainless, childish, cold, extreme, insensate, irresponsible, mindless, nitwitted, out, pointless, purposeless, reasonless, semiconscious, soft-witted, unintelligent, unreasonable, witless, Weak-minded, out cold.

Usage examples for senseless

  1. Speed's senseless words rang in my ears-" She cares for you!" – The Maids of Paradise by Robert W. (Robert William) Chambers
  2. Wishing seemed to her senseless as life was. – The Tragic Comedians, Complete by George Meredith Last Updated: March 7, 2009