Are you saying that you have 7000 misspelled words that need to be corrected?
Or are you saying that you have 7000 words that excel flags as misspelled?
If the words are flagged in error (for your jargon), then couldn't you just add
those words to your custom dictionary?
Excel (and other office applications) will include your custom dictionary and
not flag them anymore.
If the words are actually incorrect, could you just correct them and then save
that version as your new workbook?
If you're asking if excel has an option like Word that keeps of those words you
told it to ignore, then I don't think so.