Synonyms for Cipher:

adj.

zero (adjective)
naught.

n.

alphanumeric, break, cryptography, CAPTCHA, CODED, code name. has-been, important, lackey, mediocrity, minion, minnow, pip-squeak, shrimp, small fry, nebbish, small potatoes. cipher (noun)
aught, calculate, code, compute, cryptograph, cypher, encipher, encode, encrypt, figure, goose egg, inscribe, nada, naught, nil, nix, nobody, nonentity, nothing, nought, null, reckon, secret code, work out, write in code, zero, zilch, zip.
communication (noun)
cypher.
letter (noun)
abc, alphabet, character, consonant, letter, literal, monogram, upper case, vowel.
nonexistence (noun)
barrenness, nonentity, null, vacuousness, non-subsistence.
number (noun)
bit, digit, figure, integer, notation, number, numeral, sign, symbol.
secret (noun)
code, conundrum, cryptogram, enigma, labyrinth, maze, mystery, poser, problem, puzzle, riddle, brainteaser.
unmeaningness (noun)
absurdity, babble, blather, double talk, drivel, gobbledygook, hogwash, jabber, meaninglessness, noise, nonsense, senselessness, unmeaningness.
unsubstantiality (noun)
apparition, emptiness, immateriality, impalpability, insignificance, intangibility, mirage, nonexistence, nothingness, nullity, phantom, spectre, unreality, vacancy, vacuity, zero, Ethereality, Nihility, tenuousness.
written symbol (noun)
character.
zero (noun)
aught, blank, dummy, naught, nil, nobody, nothing, nought, void, zilch.
zero; nothingness (noun)
blank, goose egg, nada, naught, nil, nobody, nonentity, nothing, nought, nullity, zilch, zip.

v.

communication (verb)
code, cypher, encipher, encrypt, inscribe, write in code.
figure out code (verb)
break, calculate, compute, figure, reckon.

Other synonyms:

alphanumeric, cryptography, pip-squeak, nebbish, CAPTCHA, code name. mediocrity, shrimp, CODED. break. encode
encrypt.
encrypt
encode.
Other relevant words:
alphanumeric, break, calculate, compute, cryptograph, cryptography, cypher, encipher, encode, encrypt, goose egg, inscribe, mediocrity, nada, nix, pip-squeak, reckon, secret code, shrimp, small fry, work out, write in code, zip, nebbish, CAPTCHA, CODED, small potatoes.

Usage examples for cipher

  1. It read: " Use cipher – Autobiography of Andrew Carnegie by Andrew Carnegie
  2. Kropotkin did not look at the hour, but pulled off the lid, and found a tiny cipher note containing a new plan. – Comrade Kropotkin by Victor Robinson
  3. The cipher tells nothing. – Helmet of Navarre by Bertha Runkle