1. identical, indistinguishable

exactly alike; incapable of being perceived as different

Example Sentences:
'rows of identical houses'
'cars identical except for their license plates'
'they wore indistinguishable hats'

Synonyms

• identical

2. indistinguishable, undistinguishable

not capable of being distinguished or differentiated

Example Sentences:
'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'

Synonyms

• undistinguishable