As prepositions the difference between during and next
is that
during is for all of a given time interval while
next is on the side of; next to.
As a verb during
is present participle of lang=en.
As a proper noun During
is {{surname}.
As an adjective next is
following in a sequence.
As a determiner next is
the one immediately following the current or most recent one.
As an adverb next is
in a time, place or sequence closest or following.
As a noun next is
the one that follows after this one.