I confess I tried asking this question earlier and either I did a poor job of
phrasing it or something else went awry.

If Excel has data in a column, and that data is a subset within a group that
is defined by a column heading; can Excel compare that original data array
(the sub-set) with other columnar data arrays and somehow flag the ones that
are identical to the original?

Example:
Header: Grocery Items

Array:
Onions
Cucumbers
Lettuce
Potatoes
Cabbage

If the unique array defined above shows up under another column, which has
the heading Vegetables, can Excel recognize that the elements of the two sets
are identical and that no element of one is excluded from the group of
elements in the other? More importantly, can it "tell" me that it's found a
matching array?

How would I approach this? I can't create a phrase of VB, so if it takes
some Macro-writing, please tell me what to write. I can copy VB all day
long, I just don't "speak it". Thanks in advance for trying to help.