Synonyms of the word

spurious

• adj. false, not authentic, not genuine.
• adj. (archaic) bastardly, illegitimate.

bastardly

• adj. Having been born out of marriage.
• adj. Of no use or purpose; useless; worthless.

counterfeit

• adj. False, especially of money; intended to deceive or carry appearance of being genuine.
• adj. Inauthentic.
• adj. Assuming the appearance of something; deceitful; hypocritical.
• n. A non-genuine article; a fake.
• n. One who counterfeits; a counterfeiter.
• n. (obsolete) That which resembles another thing; a likeness; a portrait; a counterpart.
• n. (obsolete) An impostor; a cheat.
• v. (transitive) To falsely produce what appears to be official or valid; to produce a forged copy of.
• v. (transitive, obsolete) To produce a faithful copy of.
• v. (transitive, obsolete) To feign; to mimic.
• v. (transitive, poker, usually "be counterfeited") Of a turn or river card, to invalidate a player's hand…

false

• adj. Untrue, not factual, factually incorrect.
• adj. Based on factually incorrect premises.
• adj. Spurious, artificial.
• adj. (logic) Of a state in Boolean logic that indicates a negative result.
• adj. Uttering falsehood; dishonest or deceitful.
• adj. Not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous.
• adj. Not well founded; not firm or trustworthy; erroneous.
• adj. Not essential or permanent, as parts of a structure which are temporary or supplemental.
• adj. (music) Out of tune.
• adv. Not truly; not honestly; falsely.
• n. One of two options on a true-or-false test.

illegitimate

• adj. Illegal; against the law.
• adj. Born to unmarried parents.
• adj. Illogical; incorrectly deduced.
• adj. Not authorized by good usage; not genuine; spurious.
• adj. (botany) Involving the fertilization of pistils by stamens not of their own length, in heterogonously…
• n. someone born illegitimately.

imitative

• adj. Imitating; copying; not original.
• adj. Modelled after another thing.

inauthentic

• adj. Not authentic or genuine; spurious.

misbegot

• adj. misbegotten; unlawfully or irregularly begotten; of bad origin.

misbegotten

• n. (obsolete, sometimes used abusively) One born illegitimately (i.e., out of wedlock); a bastard.
• n. (loosely, quasi-nominal collective, as “the misbegotten [are]”) That set of people born into infelicitous…
• adj. (of a person) Born out of wedlock; illegitimate.
• adj. (by extension, figuratively) Ill-conceived.
• adj. expressing contempt, disdain, or hatred.

specious

• adj. Seemingly well-reasoned, plausible or true, but actually fallacious.
• adj. Who or that uses fallacious but deceptively plausible arguments, deceitful.
• adj. Having an attractive appearance intended to generate a favorable response; deceptively attractive.
• adj. (obsolete) Beautiful, pleasing to look at.

unauthentic

• adj. Not authentic.