Gentlemen,
instead of proposing funny words meeting anyone's personal
taste it would be better to use the words as they
are already defined and known.
E.g. Menezes, Oorschot, Vanstone, Handbook of
Applied Cryptography, p. 3:
entity authentication of identification
corroboration of the identity of an entity (e.g., a person,
a computer terminal, a credit card, etc.)
authorization
conveyance, to another entity, of official sanction to do or
be something
validation
a means to provide timeliness of authorization to use or
manipulate information or resources
access control
restricting access to resources to privileged entities
regards
Hadmut