Spurious (adjective) بظاہر ٹھیک، جعلی، نقلی

not being what it purports to be; false or fake.
Example: “separating authentic and spurious claims”
Synthetic (adjective) ترکیبی، انسان کی بنائی ہوئی، مصنوعی

(of a substance) made by chemical synthesis, especially to imitate a natural product.
Example: “synthetic rubber”