Supplementary tools
Clearing near-duplicates
This is an amazing tool, which allows to remove all forms of a keyword except for one which is most likely to be searched for.
This tool allows to quickly and conveniently remove all keywords except those that have the most likely semantic form.
The system will analyze all keywords in your list and out of all inexact duplicates it will leave only one, that has the highest exact search volume. I.e. all the "house purchase" and "purchase house" permutations will be reduced to a single form.

The list size is restricted, no more than 100,000 entries.