The difference between Cipher and Nonentity

When used as nouns, cipher means a numeric character, whereas nonentity means an unimportant or insignificant person.

Cipher is also verb with the meaning: to calculate.

check bellow for the other definitions of Cipher and Nonentity

Cipher as a noun:

A numeric character.
Cipher as a noun:

Any text character.
Cipher as a noun:

A combination or interweaving of letters, as the initials of a name; a device; a monogram.

Examples:

"a painter's cipher, an engraver's cipher, etc."
Cipher as a noun:

A method of transforming a text in order to conceal its meaning.

Examples:

"The message was written in a simple cipher. Anyone could figure it out."
Cipher as a noun (cryptography):

A cryptographic system using an algorithm that converts letters or sequences of bits into ciphertext.
Cipher as a noun:

Ciphertext; a message concealed via a cipher.

Examples:

"The message is clearly a cipher, but I can't figure it out."
Cipher as a noun:

A grouping of three digits in a number, especially when delimited by commas or periods:

Examples:

"The probability is 1 in 1,000,000,000,000,000 — a number having five ciphers of zeros."
Cipher as a noun (music):

A fault in an organ valve which causes a pipe to sound continuously without the key having been pressed.
Cipher as a noun:

A hip-hop jam session.
Cipher as a noun:

The path (usually circular) shared cannabis takes through a group, an occasion of cannabis smoking.
Cipher as a noun:

Someone or something of no importance.
Cipher as a noun (dated):

Zero.

Cipher as a verb (intransitive, regional, dated):

To calculate.

Examples:

"I never learned much more than how to read and cipher."
Cipher as a verb (intransitive):

To write in code or cipher.
Cipher as a verb (intransitive, music):

Of an organ pipe: to sound independent of the organ.
Cipher as a verb (obsolete):

To decipher.

Examples:

"rfquotek Shakespeare"

Nonentity as a noun:

an unimportant or insignificant person
Nonentity as a noun (uncountable):

the state of not existing; nonexistence