Synonyms for Halfway (same or very similar meaning)
WordNet sense 1 (lying between two extremes in time or space or degree):
intermediate, intermediate
WordNet sense 2 (constituting or comprising a part or fraction of a possible whole or entirety):
fractional
WordNet sense 3 (equally distant from the extremes):
center, middle, midway
WordNet sense 4 (in or near a center or constituting a center; the inner area):
central
From the ODE community, based on WordNet
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