Spurious
Part of speech: adjective
Definition: false, not authentic, not genuine bastardly, illegitimate
Unauthentic
Part of speech: adjective
Definition: Not authentic
Spurious as an adjective is false, not authentic, not genuine while Unauthentic as an adjective is not authentic
Part of speech: adjective
Definition: false, not authentic, not genuine bastardly, illegitimate
Part of speech: adjective
Definition: Not authentic
We hope you now know whether to use Spurious or Unauthentic in your sentence.