Synonyms for Guiltless:

adj.

above suspicion (adjective)
blameless.
blameless (adjective)
stainless, unspotted, unblemished, in the clear, not guilty, above suspicion, clean-handed.
clean (adjective)
honorable, decent, undefiled, moral, respectable.
clear (adjective)
cleared, exculpated, absolved, exonerated.
exemplary (adjective)
estimable, worthy.
good (adjective)
lily-white, uncorrupted, ethical.
guiltless (adjective)
innocent, faultless, irreproachable, unsullied, pure, virtuous, sinless, good, immaculate, clean, unimpeachable, righteous, inculpable, spotless, clear, untarnished, untainted.
harmless (adjective)
naive, simple, innocuous.
immaculate (adjective)
chaste.
innocent (adjective)
innocent, untainted, naive, unblemished, untarnished, virginal, childlike, irreproachable, spotless, snowy, white, pure-hearted, blameless, unblamable, angelic, unspotted, uncorrupted, chaste, unsophisticated, innocuous.
not guilty (adjective)
clear.
pure (adjective)
fundamental, chaste, undefiled, elementary, formative, clean, essential, austere, irreducible, nascent, basic, primary, plain, unadulterated, indivisible, primal, pure, prime, untarnished, simple, Simon-pure, bare, decent, stainless, foundational, monolithic, unsullied, sinless, unblemished, angelic, blameless, atomic, unadorned, innocent, unalloyed, faultless, untainted, uncluttered, elemental, purebred, immaculate, white, basal, stark, aboriginal, spotless, virtuous, honorable, clear, undiluted.
virtuous (adjective)
virtuous, estimable, valorous, moral, faultless, decent, ethical, pure, righteous, Taintless, unsullied, respectable, uncorrupted, creditable, heroic, blameless, honorable, unspotted, upstanding, noble, angelical, clean, worthy, good, high-minded.

n.

legal, legitimacy, legally, rightful, lawful, legitimate, current. unblamable, in the clear, lily-white. guiltless (noun)
exculpated, blameless, irreproachable, not guilty, unimpeachable, clean-handed, innocent, cleared, clear, inculpable, absolved, vindicated, acquitted, exonerated.
harmless (noun)
above suspicion.

Other synonyms:

rightful, current, legitimacy, lawful, unblamable, legally, legal, legitimate. lily-white. Other relevant words:
inculpable, clean-handed, acquitted, exculpated, in the clear, irreproachable, vindicated, legally, not guilty, unblamable, above suspicion, legal, lily-white, exonerated, cleared, lawful, unimpeachable, absolved.

Usage examples for guiltless

  1. I ask you to sign a formal document, which I shall bring to you, holding me guiltless of any design against either you or Madame de la Bidache. – The Chevalier d'Auriac by S. (Sidney) Levett-Yeats
  2. You perhaps will find some means to justify my poor guiltless Justine. – Frankenstein or The Modern Prometheus by Mary Wollstonecraft (Godwin) Shelley
  3. I will not say that I considered her guiltless at the time. – The Hollow of Her Hand by George Barr McCutcheon