Synonyms of 'nonentity'
nobodyDictionary, lightweight (informal) , mediocrity
She was written off after that as a political nonentity.
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If you describe someone as a cipher, you mean that they have no power and are used by other people to achieve a particular purpose.
They were little more than ciphers who faithfully carried out the Fuehrer's commands.
Thesaurus for nonentity from the Collins English Thesaurus
If you refer to someone as a nonentity , you mean that they are not special or important in any way.