A suggestion of choice
or only, or but, as an alternative, as a choice, as a substitute, on the other hand, in turn, conversely, in other
words, or else, in preference to, preferentially; see also
Antonyms neither*, nor, without choice.
A suggestion of correction
or not, or not exactly, in reverse, reversing it, on the
contrary, contrary to, oppositely, or rather, instead of,
correctly speaking; see also instead, rather 2.