indistinguishable
adjective/ˌɪndɪˈstɪŋɡwɪʃəbəl/
Frequency rank: #11,052 most common English word
Meaning
Impossible to tell apart; so similar that no difference can be detected.

Example sentence
The two paintings were indistinguishable from each other, even to trained experts.
Synonyms & related words
- identical
- indiscernible
- alike
- inseparable
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