adjective
1.
Synonyms: illegitimate 1, baseborn, bastard, fatherless, misbegotten, natural, supposititious, unfathered
2.
Synonyms: artificial 2, dummy, ersatz, false, imitation, mock, sham, simulated, substitute
3.
of doubtful authenticity
claimed they had bought a spurious painting
Synonyms: apocryphal, bastard, unauthentic, ungenuine; compare artificial 2, counterfeit
Related Word: bogus, counterfeit, fake, phony, pseudo, sham; false, unreal
Idioms: not what ( or all) it's cracked up to be
Contrasted words: actual, real, true; bona fide, genuine, veritable
Antonyms: authentic
4.
Synonyms: artificial 3, affected, assumed, feigned, put-on
Related Word: make-believe, pretend, pretended, pseudo
5.
Synonyms: counterfeit , bogus, brummagem, fake, false, phony, pinchbeck, pseudo, sham, snide