WordNet (r) 3.0 (2006):
neolith n 1: a stone tool from the Neolithic AgeMoby Thesaurus II by Grady Ward, 1.0:
23 Moby Thesaurus words for "neolith": ancient manuscript, antique, antiquity, archaism, artifact, cave painting, eolith, fossil, mezzolith, microlith, paleolith, petrification, petrified forest, petrified wood, petroglyph, plateaulith, relic, reliquiae, remains, ruin, ruins, survival, vestige