Definify.com

Webster 1913 Edition

(ĭnˊdĭs-tĭṉk′shŭn)

Noun.

[Cf. F.

indistinction

Lack of distinction or distinguishableness; confusion; uncertainty; indiscrimination.

The

indistinction

of many of the same name . . . hath made some doubt.

Sir T. Browne.

indistinction

of all persons, or equality of all orders, is far from being agreeable to the will of God.

Sprat.

Noun.

Want of distinction; confusion; uncertainty.

The indistinction of many of the same name--

hath made some doubt.

Indiscrimination; want of distinction.

Equality of condition or rank.

indistinction ‎(countable and uncountable, plural indistinctions)

The fact of not distinguishing or making distinctions; failure to perceive or make a difference.
The condition or fact of not being distinct or different; absence of distinguishing qualities or characteristics; undistinguishableness.
(obsolete) Indistinctness, obscurity, dimness.
(nonce use) Absence of distinction or eminence; obscurity.

“Indistinction” listed on page 221 of volume V (H–K), § ii (I) of A New English Dictionary on Historical Principles [1st ed., 1901]
“indistinction” listed in the Oxford English Dictionary [2nd ed., 1989]