As initialisms the difference between bak and bac
is that
bak is
Basic Aeronautical Knowledge, an initial theory course for trainee pilots while
BAC is
Blood alcohol concentration (or blood alcohol content.
As an abbreviation bak
is back (any sense.
As a noun bac is
a broad, flat-bottomed ferryboat, usually worked by a rope.
bak
English
Abbreviation
(Abbreviation)
(head)
(text messaging) back (any sense)
----
bac
English
Noun
(
en noun)
A broad, flat-bottomed ferryboat, usually worked by a rope.
A vat or cistern.