As prepositions the difference between within and after
is that
within is
Indicates spatial enclosure or containment.after is subsequently to; following in time; later than.
As adverbs the difference between within and after
is that
within is in or into the interior; inside while
after is behind; later in time; following.
As a conjunction after is
Signifies that the action of the clause it starts takes place before the action of the other clause.
As an adjective after is
later; second (of two); next, following, subsequent.