Synonyms of authenticity in English:

authenticity


See US English definition of authenticity

See UK English definition of authenticity

See Spanish definition of autenticidad

noun

1‘the authenticity of the painting’

SYNONYMS
genuineness, originality
rightfulness, legitimacy, legality, validity, bona fides
ANTONYMS

spuriousness

2‘some doubt has been cast on the authenticity of this account’

SYNONYMS
reliability, dependability, trustworthiness, truth, veracity, verity, faithfulness, fidelity, authoritativeness, credibility
accuracy, factualness
historicity
rare veridicality
ANTONYMS

unreliability, inaccuracy