Synonyms for Side By Side (same or very similar meaning)
WordNet sense 1 (being connected either logically or causally or by shared characteristics ):
related, related toWordNet sense 2 (nearest in space or position; immediately adjoining without intervening space):
adjacent, nextWordNet sense 3 (at or within a short distance in space or time or having elements near each other):
closeFrom the ODE community, based on WordNetadd/edit