Commonest vs Communest - What's the difference?

As an adjective commonest

is (common).

(archaic) (commune).

(head)

(common)

* Less prevalent than "most common". But see commoner.

(head)

(archaic) (commune)

From (etyl) commune, in turn deriving from Latin.

(wikipedia commune) (en noun)

A small community, often rural, whose members share in the ownership of property, and in the division of labour; the members of such a community.

A local political division in many European countries.

(obsolete) The commonalty; the common people.

(Chaucer)

(obsolete) communion; sympathetic intercourse or conversation between friends

* Tennyson

For days of happy commune dead.

From (etyl) .

(commun)

To converse together with sympathy and confidence; to interchange sentiments or feelings; to take counsel.

* Shakespeare

I would commune with you of such things / That want no ear but yours.

To communicate (with) spiritually; to be together (with); to contemplate or absorb.

He spent a week in the backcountry, communing with nature.

To receive the communion.

* Bishop Burnet

To commune under both kinds.