2 column sort

I have 2 columns of words which can be multiple.
I would need the ability to sort them by alphabetical order.
Everything seemed easy till I remembered that these words may repeat, like for example:

if i got this by sorting one column, now to sort this further (BANANA part)

[LEFT]APPLE
BANANA
BANANA
BANANA
CHERRY
PINEAPPLE

I would need to look at the other column, and sort that 3 items there.

Can someone suggest me how would i sort succesfully by alphabetical order?
[/LEFT]