Synonyms for Theoretic (same or very similar meaning)
WordNet sense 1 (highly abstract and overly theoretical):
metaphysical
WordNet sense 2 (not based on fact or investigation):
speculative
WordNet sense 3 (based primarily on surmise rather than adequate evidence):
hypothetical
WordNet sense 4 (concerned primarily with theories or hypotheses rather than practical considerations):
theoretical
From the ODE community, based on WordNet
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