Synonyms for One and the same:

• adj.

  •equal (adjective)
  • egalitarian,
  • corresponding,
  • look-alike,
  • same difference,
  • break even,
  • fifty-fifty,
  • Identic,
  • indistinguishable,
  • level,
  • matching,
  • coordinate,
  • two peas in pod,
  • homologous,
  • unvarying,
  • parallel,
  • uniform,
  • matched,
  • stack up with,
  • comparable,
  • look alike,
  • proportionate,
  • same,
  • lookalike,
  • invariable,
  • commensurate,
  • co-ordinate,
  • evenly matched,
  • spit and image,
  • according,
  • identical,
  • duplicate,
  • to the same degree,
  • double,
  • equivalent,
  • balanced,
  • correspondent.
  •identical (adjective)
  • very,
  • dead ringer,
  • like,
  • like two peas in a pod,
  • ditto,
  • xerox,
  • carbon copy,
  • exact,
  • spitting image,
  • very same,
  • twin,
  • interchangeable.
  •synonymous (adjective)
  • coincident,
  • compatible,
  • convertible,
  • identified,
  • similar,
  • alike,
  • Synonymic,
  • apposite.

• Other synonyms:

  •
  • tantamount.
  •Other relevant words:
  • one,
  • all one,
  • the same,
  • very thing,
  • actual thing,
  • all the same,
  • identical same,
  • even.

Antonyms for One and the same:

• adj.

  • equal
    dissimilar, unlike, unequal, unfair, biased, disproportionate, not alike, unjust, changing, variable, mismatched, varying, unmatched, inconsistent, different, divergent, Unequitable.
  • identical
    diverse, opposite, distinct.
  • synonymous
    polar.