Adjective: indistinguishable ,in-di'sting-gwi-shu-bul
- Exactly alike; incapable of being perceived as different
"they wore indistinguishable hats";
- identical
- Not capable of being distinguished or differentiated
"The twins were almost indistinguishable from each other";
- undistinguishable
See also: same
Antonym: distinguishable