indistinguishable

adjectives

exactly alike; incapable of being perceived as different
"rows of identical houses"; "cars identical except for their license plates"; "they wore indistinguishable hats"
is derived from
not capable of being distinguished or differentiated
"the two specimens are actually different from each other but the differences are almost indistinguishable"; "the twins were indistinguishable"; "a colorless person quite indistinguishable from the colorless mass of humanity"
antonym