Same
Part of speech: adjective
Definition: Identical. Similar, alike. Used to express the unity of an object or person which has various different descriptions or qualities. A reply of confirmation of identity.
Part of speech: pronoun
Definition: The identical thing, ditto. Something similar, something of the identical type. It or them, without a connotation of similarity. Often legal.
Example sentence: I can't relate to lazy people. We don't speak the same language. I don't understand you. I don't want to understand you.
Indistinguishable
Part of speech: adjective
Definition: Not distinguishable; not capable of being perceived, known, or discriminated as separate and distinct; hence, not capable of being perceived or known.