Table of Contents POS
HYPHEN
WORDNET DICTIONARY
OXFORD DICTIONARY
ROGET THESAURUS

WORDNET DICTIONARY

Adjective undistinguishable has 1 sense

• undistinguishable(a = adj.all) indistinguishable - 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"

OXFORD DICTIONARY

ROGET THESAURUS

undistinguishable

Indiscrimination

N indiscrimination, indistinguishability, indistinctness, indistinction, uncertainty, incomparability, indiscriminate, undistinguished, indistinguishable, undistinguishable, unmeasured, promiscuous, undiscriminating, valeat quantum valere potest.

For further exploring for "undistinguishable" in Webster Dictionary Online