Keyword Duplicate Removal Tool

need a tool, that can remove duplicate keywords from the given keyword list + can also remove the revert keywords. if there is a keyword1 then this should not come again in the list + revert of this keyword "1keyword" should also be removed. keyword file import required - no text area Plz Also- Export to Excel Function (1kwd per column down) And divide keywords into chosen # of groups (Puts several line breaks in between keywords w/ Group #1, Group#2, etc. listed above each break/group (Must also be able to combine these groups back into one list with one click) Also-Alphebetize keywords function