1) Alike 2) Equal 3) Identical 4) Imperceptible 5) Indistinct 6) Same 7) Unclear 8) Undistinguishable 
• (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.Indistinguishable: words in the de...
In`dis·tin'guish·a·ble adjective 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 colo...
[adj] - not capable of being distinguished or differentiated
undistinguishable adjective 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 pers...
not distinguishable. · indiscernible; imperceptible.