ETYM Latin adulteratio.
Being mixed with extraneous material; SYN. debasement.
The act of adulterating (especially the illicit substitution of one substance for another)

ETYM Cf. French falsification.
1. A willful act of falsifying; SYN. misrepresentation, falsehood.
2. The act of determining that something is false; SYN. falsifying, disproving, refuting, confuting.

ETYM Cf. French forgerie.
Criminal falsification by making or altering an instrument with intent to defraud.
The making of a false document, painting, or object with deliberate intention to deceive or defraud. The most common forgeries involve financial instruments such as checks or credit-card transactions or money (counterfeiting). There are also literary forgeries, forged coins, and forged antiques.
Financial gain is not the only motive for forgery. Han van Meegeren probably began painting in the style of Vermeer to make fools of the critics, but found such a ready market for his creations that he became a rich man before he was forced to confess. The archeological Piltdown Man hoax in England in 1912 also appears to have been a practical joke. + prikaži više