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First set of words:
Illusion,transparent,smooth,rigid,luminous,sandy,rocky,silty,woody,natural,metalic,plastic
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Second set of words:
Synthetic,heavy,light,sticky,stiff,dum,mysterious,shinny,rusty,dark,bright,warm
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third set of words:
cold,cloudy,homogenious,isotrophic,fragile,tough,chaotic,dynamic,linear,circular,repetitive,biological