THESAURUS
selfsame
Doppelganger, actual thing, alike, all one, all the same, carbon copy, consubstantial, copy, dead ringer, ditto, double, duplicate, equivalent, exact, exact counterpart, exactly alike, facsimile, homograph, homonym, homoousian, homophone, idem, identic, identical, identical same, indistinguishable, just alike, like, no other, none other, one, replica, same, spit and image, spitting image, synonym, the same, the same difference, twin, undifferent, very, very image, very same, without difference, without distinction
ROGET THESAURUS
selfsame
Identity
N
identity, sameness, coincidence, coalescence, convertibility, equality, selfness, self, oneself, identification, monotony, tautology, facsimile, homoousia: alter ego, ipsissima verba, same, self, very, one and the same, very thing, actual thing, real McCoy, no other, one and only, in the flesh, identical, self, ilk, the same,
selfsame, one and the same, homoousian, coincide, coalescent, coalescing, indistinguishable, one, equivalent, tweedle dee and tweedle dum, much the same, of a muchness, unaltered, identically, on all fours.