Indistinguishable(a.) Not distinguishable; not capable of being perceived, known, or discriminated as separate and distinct; hence, not capable of being perceived or known; as, in the distance the flagship was indisguishable; the two copies were indisguishable in form or color; the difference between them was indisguishable.
Thesaurus Entries
alike, all one, all the same, blear, bleared, bleary, blurred, blurry, confused, consubstantial, dark, dim, duplicate, equal, equivalent, exactly alike, faint, feeble, filmy, foggy, fuzzy, half-seen, half-visible, hazy, homoousian, identic, identical, ill-defined, imperceptible, inconspicuous, indefinite, indiscernible, indistinct, indistinctive, inseparable, interchangeable, just alike, like, low-profile, merely glimpsed, misty, obscure, one, out of focus, pale, same, selfsame, semivisible, shadowy, standard, stereotyped, tantamount, twin, uncertain, unclear, undefined, undifferent, undifferentiated, undiscriminated, undistinguishable, undistinguished, uniform, unplain, unrecognizable, vague, weak, without difference, without distinction